I have a table that has a NAME value. I have another table that has a related NAME value. I want to count the number of rows from Table1 that have NAME: John Doe, and insert that Count into Table2, under count where that name matches.
我如何在MYSQL中写这句话?
您可以这样做,在您加入的问询中准备期望值:
INSERT INTO `Table2`(`name`, `count`)
SELECT John Doe , COUNT(*) AS `count`
FROM `Table1`
WHERE `name` = John Doe ;
In this case, the result of the selection will be [ John Doe , ]. and next, the selection result will be inserted in Table2
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