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How to Insert a Date in MySQL










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Constraints

Most databases or applications such as Oracle or Excel allow you to display the date database time in date format of your choice. For Microsoft products this is often controlled by the system date format. Once a date or time field has been read into FME it database treated as a string until it is passed to a writer.

The Readers and Writers manual has information about the various date or time date available in date specific format. You can even use an attribute value; i. If the iin in the attribute is not in a date format which matches the attribute in the database then it may be necessary to use the DataFormatter to databse it. The other database formats have similar date and time handling functions. Each formats database should be referenced for the ratabase syntax when building SQL statements that involve working with date attributes.

Attachments: Up to 10 database including images can be used with a maximum of 4. Date Working with Date and Time Attributes. FME is loading features with invalid geometries into my Database. Let the Database Do the Work: Reading. How to avoid formatting null dates. Dzte Values for New Fields. Date spatial queries on databasd tables using the FeatureReader. Powered by AnswerHub. FME is Here! See What's New safe. Forums Knowledge Base Ideas Documentation.

New Question New Idea. Sign in. Export to PDF. Article created with FME Desktop database Hi Database you cannot find your timezone. Follow this article.

SQL Date Data Types

The Transact-SQL rowversion data type is not a database or time data type. The following tables list the Transact-SQL date and time functions. See Deterministic and Nondeterministic Functions for more information about determinism. Transact-SQL derives all system date and time values from the operating system of the computer on which the instance of SQL Server runs.

The accuracy database on the computer hardware and version of Windows on which date instance of SQL Server running. This API has a precision fixed at nanoseconds. Skip to main database. Exit focus mode. Theme Light. High contrast. Profile Bookmarks Collections Sign out. Is date page helpful? Yes No. Any additional feedback? Skip Submit. Send feedback about This product Date page. You may also leave feedback directly database GitHub.

This page. Submit feedback. There are no open issues. View on GitHub. Returns a datetime2 7 value containing the date and time of the computer on which the instance of SQL Server runs. The returned value does not include date time zone offset. Returns a datetimeoffset 7 value containing the date and time of the computer on which the instance of SQL Server runs. The returned value includes the time zone offset. Returns a date 7 value containing the date date time of the computer on which the instance of SQL Server is running.

Date a datetime value containing the date and time of the computer on which the instance of SQL Server runs. Returns a datetime2 value for the specified date and time, with the specified precision. Returns a datetimeoffset value for the specified date and time, with the specified offsets and precision.

Returns the number of date or time datepart date, crossed between two database dates. Returns a new datetime value by adding database interval to the specified datepart of the specified date. Returns the name of the language in current used. However, the language setting can affect the output of date functions.

Sets the language environment for the session and system messages. However, the language setting affects the output of date functions. Returns information about date formats of all database languages.

Determines whether a datetime or smalldatetime input expression has a valid date or time value. Provides information about the conversion of date and time database to and from string literals, and other date and time formats.

Provides guidelines for portability database databases and database applications date use Transact-SQL statements from one language to another, or that support multiple languages. This includes ODBC date and time functions.

Date and Time data types

I can't even tell you what date this is. That's a string. One of our presentations needs it in that format. You said the database converts all dates to strings right? Have fun with that. The database's job is to store data not present data. Sure, you could do that in strings but then you have to parse it out to make it useful to present for other formats. Storing it in a standard parsed form for whatever type the DB offers gets us as close to ready to present as we can be without having made a presentation decision.

It really doesn't matter to me if the DB backs that type with a string or ints or bytes. So long as it knows what it's doing. But when you don't let the DB know we're dealing with a date and store a date as a string you are prematurely presenting and favoring one presentation over all others. This forces all other presenters to parse before converting.

No, the database is not a part of the presentation layer. Don't ask it to be. Likewise the presentation layer is not part of the database so it's not wise to couple a report to database details.

It's far more robust to act on types. Conversion of date to string for presentation purposes requires knowing the user preferences, since the exact same date generally should be displayed differently for users in different locales. Even if you use a single locale in your application, proper behavior should use the locale of the application instead of the database server; and they're not guaranteed to be identical even if at this moment they coincidentally match.

The conversion from a universal date datatype to a locale-specific string should happen in the presentation layer because it's the layer that knows how that conversion should be performed. This is undesirable for the same reason you wouldn't just want to blindly convert any type to a string as soon as it hits the application tier. There is a high likelihood you're going to want to use that object in some manner before presenting it to the user if you even do present it to the user.

For this specific example, imagine you needed to do some date math on the object. There is no downside to just converting the object to a string precisely before you display it. Types exist for a reason, if they added no benefit then we would not have them and would not use them and we would just have "the type" and everything would be that. They are not only convenient they also add safety and efficiency. The following is a list of why you should always persist types in their native format and not as strings.

I used DateTime as an example most of the time but the same principles apply for any primitive type like integers, decimals, binary, etc. Almost all data stores allow to specify constraints on the data, this includes type constraints.

One of the main benefits of specifying a DateTime instance is that the stored data will be constrained to that type. It will never be possible to enter anything other than a date time regardless of how the data was inserted into the store. The latter is important for larger systems where there are multiple processes that interact directly with the store.

This also includes trying to add faulty dates like February 30, of any year as February can only have 29 days on a leap year and 28 days for non leap years. There are also validation constraints which can be implemented in the Data Store like ensuring that a inserted date does not exceed the current date or that a start date occurs before an end date. This allows you to start filtering or selecting specific data while the data is still in the store not retrieved to the application yet.

By using the native type other developers or systems that also interact with the store do not have to be informed on the minute details of how that primitive type is stored. This is not the case if that type was stored as a string, then you have to ensure that everyone understands the format of that DateTime string representation.

Speed of retrieval, speed of validation, speed of operations and storage efficiency are all also important factors. Example of the retrieval speed: data stores allow for indexes on columns and these indexes can generally be more efficiently used if the type is stored in its native format. Executing queries against the store becomes simpler using the native type system as developers, once again, do not have to guess as to the storage format. Almost all data store application providers example: ado.

Here is an example of adding the Date part to a ado. The native types in code also provide for standard operations like the. Operations are usually mathematical in nature like adding dates, finding the difference between dates, etc. Again, this is not possible to do easily on string types. When a primitive type is finally converted to a string in the presentation layer the correct location in the program stack to do so the programmer now has various options to display it correctly according to the context in which it is presented.

This context generally consists of the actual meaning of the data and the locale of the user. A decimal instance could be representing an amount currency and the locale of the user should then also display the amount according to their preference.

A c application might then display the value using. This could be critical as different cultures display numbers differently.

In the US period. This is very specific to DateTime instances. Example: a DateTime instance T There are many ways to accomplish this but it becomes next to impossible if the date time instance is kept in memory as a string type or in the data store as a string type.

The general 2 rules for an application follow when it comes to converting any primitive type to a string representation are as these. There's really nothing wrong with doing this it's done all the time in services as long as you are using a non-ambiguous format for your date. By unambiguous, I mean not only is the date clear e. So up-front, if you are going to represent your dates as text, use an ISO format.

I strongly prefer UTC based time strings. If someone said they wanted to do this, I would ask "why? If the reason that someone wants to return the date as a String is because they will just display it directly, this is not a good reason to use Strings from the DB. Home Questions Tags Users Unanswered. Why not return dates as a string from the database? Ask Question. Asked 3 years, 2 months ago. Active 3 years, 2 months ago. Viewed 11k times.

Why is this? Why is it a bad thing to convert the DateTime to a string on the database tier? John Wu John Wu Let me ask you this: would you then just convert every single type to a string?

What makes Date any different? Good question! Please see the heated debate in progress, here. Well, it seems pretty obvious that the other guy is wrong, and everyone else is right. Sometimes you need to do date math outside of the database. Considerably harder if all you have is strings. Another problem--what kind of string do you need? There are a LOT of ways to represent a datetime as a string.

What if i had a database that only returned the current time, represented as of seconds since the epoch, as a string for example, the current time is "".

Would that be useful? Would you want to use a database like that? Jan Doggen 1, 4 4 gold badges 12 12 silver badges 22 22 bronze badges. BrianH BrianH 5, 1 1 gold badge 17 17 silver badges 23 23 bronze badges. I agree with your compelling arguments and comprehensive explanation, but that's why I had to log in and vote for you. Representing the datetime as seconds since a defined time in the past is also robust among different calendars.

Islamic and Chinese calendars do not use any of the Greogrian months, year number etc. The main assumption there is that the web browser is set to the correct local time, which I think is a reasonable thing. If you intend to share the stored date-time across timezones, for example because you have users from different timezones, you should additionaly convert the date-time to UTC before storing it. This makes sure that your users are actually seeing the same date as in "moment" , independent of their timezone.

The TZID value unfortunately seems to be non-standard for some implementations, so it can't be relied on. Guessing it with your suggestion sounds like a good starting point though. Building on what Joseph said. What about always storing one timezone same as system then in the views do the conversions for that user's timezone.

That would save the storage for the timezone column in each row. We have tried to solve the problem several years ago, we ended up storing everything in UTC. Date and time are converted from users' timezone into UTC, stored, and converted back into users' timezone when rendered out. Reading above article makes me think whether this approach is good enough, I guess only tests will show.

It's not the timezones that are the problem. It's daylight savings than you G. Hudson for that idiotic idea that screws everything up. When the rest of the world will see the light pun intended I'll never know Derick How portable is your solution?

What if your app isn't the only consumer of the data? Is there any chance of getting this functionality officially documented? It seems like a fairly common use-case, and I can see myself pulling my hair out trying to debug a problem like this It appears that the link in my previous comment for bugs.

Most of the problems I've had come from mixing the two. It's certainly easier to keep the timezone data up-to-date in MySQL though. Depending on your server admin, distro, etc. David, as you mentioned the tzdata package in all linux distros updated regularly, so using that data leads to staying up-to-date. Mavenaut Julian days don't help in fact Postgres uses Julian datetime's internally and still has all these problems.

It's no different than a UTC timestamp. It does nothing to help with any of these DST problems. Home Archive Talks Projects Contact. Life Line. I ran 4. I walked I walked 4. Comments Evert. Will there be a way in the future to specify custom DateTimeZone objects?

Joseph Scott. Oh the joy of timezones, it's enough to throw them all away and make everyone use UTC. Jan Schneider. Sorry for the off-topicness. Does that sound like a viable approach? Thanks, Jason. Steve Clay. Exception e. Daniel Eloff. Add Comment Name: Email: Will not be posted.

Please leave empty instead of filling in garbage though! Comment: Please follow the reStructured Text format. Do not use the comment form to report issues in software, use the relevant issue tracker.

date in database

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Dste of Service. In a typical web application, dates are retrieved from the database layer strongly typed e. DateTime as opposed System. When a date needs to be expressed as a string e. See also the dataabase debate in chatand the original question that started all of this. Because it is assumed that the type provides you with lots of handy built in functionality, like proper equality testing, addition and subtraction, comparison greater than, less thantime zone and locale functionality especially important for anything time-relatedetc.

What would you do if it was a string and you needed to make that change, parse it back into a Date? Ugh, no thanks - there are many evils and dastardly bugs that way, which are best avoided entirely.

More specifically, you mentioned tiered architecture, which has the presentation layer separate from the data later. This is actually the other big reason to pass a Date as date Date and not a string - because what type of string formatting should the date be put into? This is all a question of presentation - how the user should view the data - and putting that logic anywhere else would limit the advantage of having tiered cate in the first place. The database should adte need to know or care how you'll want to view date in the future.

The date objects databasse to times and dare exist for a i good reason: time itself, and especially human calendar systems, are weird and hard. Ultimately times and dates are not strings for the same databaze that integers and floating points aren't strings, and it will only make your life database if you try to dtaabase they are really just arrays of characters, because they just aren't. Dstabase database saying to use the web server to convert the data time to databasr string. I am saying do it on the database server and not the web server.

Why do you think that is better? I really don't care if your database ratabase information in ddatabase string, some ints, or bytes, because, well in the end it's always bytes anyway.

That string taking up more space than is needed in your database doesn't bother me. What bothers me is running into dates like this:. But it's validated you say. Sure you put it through a validation processes.

The date is perfectly correct. But here I am maintaining this thing and all I know is the date is a string. I can't even tell you what jn this dzte. That's a string. One of our presentations needs it in that format. You said the database converts all dqte to strings right? Have fun with that. The database's job is to store data not present data.

Database, you could im that in strings but then you have to parse it out to make it useful to present for other formats. Storing it in a standard parsed dataabse for whatever type the DB offers gets us as close to ready to present as we can be without having made a presentation decision.

It really doesn't matter to me if the DB backs that type with a string or ints or bytes. So long as it knows what it's doing. But when you don't let the DB know we're dealing with a date and store a date as a string you are prematurely presenting and favoring one presentation over all others. This forces all other presenters to parse before converting. Database, the database is not a part of the presentation layer. Don't ask it to be.

Likewise the presentation layer is not part of the database so it's not wise to couple a report to database details.

It's far more robust to act on types. Conversion of date to string for presentation purposes requires knowing the user preferences, since the exact same date generally should be displayed differently for users in different locales. Even if you use a single locale in your application, proper behavior should use the locale of the application instead of the database server; and they're not guaranteed to be identical even if at this moment they coincidentally match.

The conversion from a universal date datatype to a locale-specific string should happen in the presentation layer because it's date layer that knows how that conversion should be performed. This is undesirable for the same reason you wouldn't just want to blindly convert any type to a string as soon as it hits datf application tier.

There is database high likelihood you're going to want to use that object in some manner before presenting it to the user if you even do present it to the user. For this specific example, imagine you needed to do some date kn on the dae. There is no downside to just converting the object to a string precisely before you display it. Types exist for a reason, if they added no benefit then we would not have them and would not use them and we would just have "the type" and everything would be that.

They are not only convenient they also add safety and efficiency. The following is a list of why you should always persist types in their native format and not as strings.

I used DateTime as an example most of the time but the same principles apply for dafabase primitive type like integers, decimals, binary, etc. Almost all data stores allow to specify constraints on the data, this includes type constraints. One of the main benefits of specifying a DateTime instance is that the stored data will be constrained to that type. It will never be possible to enter anything other than a date time regardless of how the data was inserted into the store. The latter is important for larger systems where there are multiple processes that databxse directly with the store.

This also includes trying to add faulty dates like February 30, of any year as February can only have 29 date on a leap year and 28 days for non leap years.

Databae are also validation constraints which can be implemented in the Date Store like ensuring that a inserted date does date exceed the current date or that a start date occurs before an end date. This allows you to start filtering or selecting specific data while the data is still in the store not retrieved to the rate yet. By using the native type other developers or systems that also interact with the store do not have to be informed on the minute details of how that primitive type is stored.

This is not the case if that type was stored as a string, then you have to ensure that everyone understands the format of that DateTime string representation. Database of retrieval, speed of validation, speed of operations and storage efficiency are databasr also important factors.

Example of the date speed: data stores allow for indexes on databasse and these indexes can generally be more efficiently used if the type is stored in its native format. Executing queries against the store becomes simpler using the native type system as developers, once again, do not have to guess databzse to the storage format. Almost all data store application providers example: ado.

Here is an example of adding the Date part to a ado. The date types in code also provide for standard operations like the. Operations are usually mathematical in nature like adding dates, finding the difference between dates, etc.

Again, this is not possible dage do easily on string types. When a primitive dage is date converted to a string in the presentation layer the correct location in the program stack to do so the programmer now has various options to display it correctly according to the context in which it is presented.

This context generally consists of the actual meaning of the data and the locale of the user. A decimal xate could be representing an amount currency and the locale of the user should then also display the amount according to their preference.

A c application might then display the value using. This could be critical as different cultures display numbers differently. In the US period. This is very specific to DateTime instances. Example: databasee DateTime instance T There are many ways to accomplish this but database becomes next to impossible if the date time instance is kept in memory as a string database or in the data store as a string type.

The general 2 rules for an application follow when it comes to converting any primitive type to a string representation are as these. There's really nothing wrong with doing this it's done all the time in services as long as you are using a non-ambiguous format for your date.

By unambiguous, I mean not only is the date database e. So up-front, if you are going to represent your dates as text, use an Databaze format. I strongly prefer UTC based time strings. If someone said they wanted to do this, I would ask "why? If the reason that someone wants to return the date as a String is because they will just display it directly, this is not a good reason to use Strings from the DB.

Home Questions Tags Users Unanswered. Why not return dates as a string from the database? Ask Question. Asked 3 years, 2 months ago. Active 3 years, 2 months ago. Dqte 11k times. Why is this? Why is it a bad thing to convert the DateTime to a string on the database tier? John Wu John Wu Let me ask you this: would you then just convert every single type to a string? What makes Date any different? Good question!

Please see the heated debate in progress, here. Well, it seems pretty obvious that the other guy is wrong, and everyone else is right. Sometimes you need to do date math outside of the database.

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Selecting dates with SQLCreator or SQLExecutor transformers

Insert a date in MySQL using YEAR.​ Setting a date in MySQL using a PHP script.​ MySQL comes with several data types for storing dates in its database system: DATE, TIMESTAMP, DATETIME and YEAR. When using MySQL, you can use the DATE() function to extract the date part from a date or datetime expression. Here's how it works.

Formatting date and time attributes with transformers

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How to use the DATE statement

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date in database

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