https://stackoverflow.com › questions › 2812843
Indexing datetime in MySQL - Stack OverflowWhat is the best way to index a datetime in MySQL? Which method is faster: Store the datetime as a double (via unix timestamp) Store the datetime as a datetime; The application generating the timestamp data can output either format. Unfortunately, datetime will be a key for this particular data structure so speed will matter.
https://stackoverflow.com › questions › 15425230
Is it a good idea to index datetime field in mysql?MySQL recommends using indexes for a variety of reasons including elimination of rows between conditions: http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html. This makes your datetime column an excellent candidate for an index if you are going to be using it in conditions frequently in queries.
https://riptutorial.com › mysql › example › 23472 › using-an-index-for-a-date-and-time-lookup
MySQL Tutorial => Using an index for a date and time lookupLearn how to use an index to retrieve rows with DATETIME or TIMESTAMP values from a large table. See the efficient and inefficient ways to write a WHERE clause for a date range query.
https://dev.mysql.com › doc › refman › 8.4 › en › timestamp-lookups.html
10.3.14 Indexed Lookups from TIMESTAMP Columns - MySQLThe optimizer performs an index scan, first converting the search value from the session time zone to UTC, then comparing the result to the UTC index entries: mysql> ALTER TABLE tstable ADD INDEX (ts); mysql> SELECT ts FROM tstable WHERE ts = '2018-10-28 02:30:00'; +-----+ | ts | +-----+ | 2018-10-28 02:30:00 | +-----+
https://dev.mysql.com › doc › refman › 8.4 › en › datetime.html
13.2.2 The DATE, DATETIME, and TIMESTAMP Types - MySQLMySQL retrieves and displays DATETIME values in 'YYYY-MM-DD hh:mm:ss' format. The supported range is '1000-01-01 00:00:00' to '9999-12-31 23:59:59' . The TIMESTAMP data type is used for values that contain both date and time parts.
https://dev.mysql.com › doc › refman › 8.0 › en › date-and-time-functions.htm
MySQL :: MySQL 8.0 Reference Manual :: 14.7 Date and Time FunctionsCONVERT_TZ() converts a datetime value dt from the time zone given by from_tz to the time zone given by to_tz and returns the resulting value. Time zones are specified as described in Section 7.1.15, “MySQL Server Time Zone Support”.
https://dev.mysql.com › doc › refman › 8.0 › en › datetime.htm
13.2.2 The DATE, DATETIME, and TIMESTAMP Types - MySQLMySQL retrieves and displays DATETIME values in 'YYYY-MM-DD hh:mm:ss' format. The supported range is '1000-01-01 00:00:00' to '9999-12-31 23:59:59' . The TIMESTAMP data type is used for values that contain both date and time parts.
https://dba.stackexchange.com › questions › 191614
mysql - Index for date part of field? - Database Administrators Stack ...The problem is that your query as written does not allow an index to be used. Modify your query so that the date range is resolved to a pair of constants and the problem is solved: WHERE datetime_field >= CURDATE() AND datetime_field < DATE_ADD(CURDATE(), INTERVAL 1 DAY)
https://www.w3schools.com › mysql › mysql_dates.asp
MySQL Date Functions - W3SchoolsMySQL comes with the following data types for storing a date or a date/time value in the database: DATE - format YYYY-MM-DD. DATETIME - format: YYYY-MM-DD HH:MI:SS. TIMESTAMP - format: YYYY-MM-DD HH:MI:SS. YEAR - format YYYY or YY.
https://www.mysqltutorial.org › mysql-basics › mysql-datetime
MySQL DATETIME Data Type - MySQL TutorialMySQL DATETIME data type allows you to store a value that contains both date and time. When you query data from a DATETIME column, MySQL displays the DATETIME value in the following format: 'YYYY-MM-DD HH:MM:SS' Code language: SQL (Structured Query Language) (sql) When you insert a value into a DATETIME column, you use the same format. For example:
