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How can I update only the time in an already existing DateTime field in MySQL? I want the date to stay the same.
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To update with the current date and time: UPDATE table_name SET date_field = CURRENT_TIMESTAMP; To update with a specific date value: UPDATE table_name SET date_field = 'YYYY-MM-DD HH:MM:SS.
Just use varchar and modify what you want in it without touch the time. In this example I use CONVERT(varchar(12), columnDatetime) to get a string with length of 12 characteres assuming a case of time with a format for example like "20:10:15.250".
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. 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.
Syntax – Update value to Current TimestampALTER TABLE table_name updates table schema. CHANGE column_name updates the column to. column_name TIMESTAMP NOT NULL defines the column as of datatype TIMESTAMP. DEFAULT CURRENT_TIMESTAMP sets the default value of the column to CURRENT_TIMESTAMP.
Try this:
UPDATE yourtable SET yourcolumn = concat(date(yourcolumn), ' 21:00:00') WHERE Id = yourid; Try this:
UPDATE t1 SET DateTimeField = CONCAT(DATE(DateTimeField),' 12:34:56'); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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