mysql update value from another column in the same table
Question
I have a table with these 2 columns : date and day date has dates and day is empty I would like to do something like this :
UPDATE table SET day='day(date)'
the idea is to take the date (its in date time format) and take out the day and insert it into the day column. any ideas ?
1 answers
solution1
1 ACCPTED 2014-10-13 23:57:50
希望这会有所帮助
UPDATE table SET day = EXTRACT(DAY FROM date)
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