![]() ![]() Invalid DATE, DATETIME, TIMESTAMP values are automatically converted to the corresponding type of zero value ( '' or ' 00:00:00' ) if the SQL mode permits such usage. This mode prevents storing zero values such as ''.ĭifferent types of zero value are shown in the following table: Date Type If this date type is to be calculated in a function, for example, in DATE_SUB() or DATE_ADD(), the result can be incorrect.īy default, TiDB enables the SQL mode NO_ZERO_DATE. ![]() If the SQL mode NO_ZERO_DATE is not enabled, TiDB allows month or day in the columns of DATE and DATETIME to be zero value, for example, '' or ''. Setting different SQL modes can change TiDB behaviors. Query OK, 1 row affected, 1 warning ( 0.01 sec) Mysql > set = '' Query OK, 0 rows affected ( 0.01 sec) Mysql > select -+ | | + -+ | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION | + -+ 1 row in set ( 0.00 sec) ) ENGINE =InnoDB DEFAULT CHARSET =utf8mb4 COLLATE =utf8mb4_bin | + -+-+ 1 row in set ( 0.00 sec) It's also worth considering the range of date and time values that you need to store, as well as the performance implications of each data type.+ -+-+ | Table | Create Table | + -+-+ | t1 | CREATE TABLE `t1` ( On the other hand, if you need to perform time-based indexing or sorting, TIMESTAMP may be more efficient. If you need to store date and time values without timezone conversion, DATETIME may be a better choice. In conclusion, both DATETIME and TIMESTAMP data types have their own advantages and disadvantages, and the choice between them depends on the specific use case. As a result, when you insert or retrieve date and time values, TIMESTAMP requires less disk I/O and memory operations than DATETIME, which leads to faster performance. ![]() This is because TIMESTAMP values are stored as a single 4-byte integer, while DATETIME values are stored as an 8-byte value. In terms of performance, TIMESTAMP is generally faster than DATETIME. This means that if you need to store date and time values with timezone information, TIMESTAMP would be the better choice. While TIMESTAMP have a advantage of indexing which will allow to execute your queries faster than DATETIMEĭATETIME does not support timezone information, while TIMESTAMP can store timezone information. If you have a large number of date and time values to store in your database, using TIMESTAMP data type could result in significant storage space savings.ĭATETIME data types provide flexibility for storing a broader range of date and time values. This means that DATETIME requires more storage space than TIMESTAMP. However, before MySQL 5.6.4, it would reserve 8 bytes. On the other side, DATETIME data type reserves 5 bytes to store the value and addition 0 to 3 bytes for fractional seconds. TIMESTAMP data type reserves 4 bytes to store the value, adding 0 to 3 bytes for fractional seconds. This limitation of TIMESTAMP is due to the fact that it stores values as the number of seconds elapsed since January 1, 1970, which is known as the Unix epoch. Let's explore the differences between DATETIME and TIMESTAMP data types in terms of performance.ĭATETIME and TIMESTAMP value can include a trailing fractional seconds part in up to microseconds, 6 digit, precision.ĭATETIME can store a wider range of values than TIMESTAMP. TIMESTAMP has a range of ' 00:00:01' UTC to ' 03:14:07' UTC (Coordinated Universal Time). TIMESTAMP data type is used to store date and time values. Here, in this article, we'll explore the differences between DATETIME and TIMESTAMP in MySQL, and help you determine which one to use based on your specific use case.ĭATETIME data type stores the date and time values in the format of 'YYYY-MM-DD HH:MM:SS' that’s range start from ' 00:00:00' to ' 23:59:59'. While they may sound similar, they have some key differences that can affect performance and functionality. In most database, when it comes to storing and manipulating date and time values, there are two primary data types to consider: DATETIME and TIMESTAMP.
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