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The DATETIME type is used for values that contain both date and time parts. MySQL retrieves and displays DATETIME values in ' YYYY-MM-DD hh:mm:ss ' format. MySQL retrieves values for a given date or time type in a standard output format, but it attempts to interpret a variety of formats for input values that you supply (for MySQL permits fractional seconds for TIME , DATETIME , and TIMESTAMP values, with up to microseconds (6 digits) precision. To define a column that includes An example of how to Insert a Date in MySQL manually. $query_manual = "INSERT INTO tablename (col_name, col_date) VALUES ('DATE: Manual Date',4.5 Date Calculations. MySQL provides several functions that you can use to perform calculations on dates, for example, to calculate ages or extract parts of dates MySQL permits fractional seconds for TIME , DATETIME , and TIMESTAMP values, with up to microseconds (6 digits) precision. To define a column that includes Date and time values can be represented in several formats, such as quoted strings or as numbers, depending on the exact type of the value and other factors. MySQL also permits a “relaxed” string format when updating and in a WHERE clause that compares a date to a DATE , DATETIME , or TIMESTAMP column. The DATE type is used for values with a date part but no time part. MySQL retrieves and displays DATE values in ' YYYY-MM-DD ' format. The supported range is '1000-01-01' to '9999-12-31' . The DATETIME type is used for values that contain both date and time parts. mysql> SELECT something FROM tbl_name -> WHERE DATE_SUB(CURDATE(),INTERVAL 30 DAY) <= date_col;. The query also selects rows with dates that lie