Question

我想知道是否可以从不同的其他列中的值更新一列...类似于：

UPDATE table
    SET column1 = CASE column2,column3
        WHEN column2 == test AND column3 == 1 THEN 100
        WHEN (column2 LIKE %test1% OR column2 LIKE %test2%) AND column3 == 2 THEN 50
        ELSE 0
    END

感谢您的回答！

编辑：回答可能遇到同样问题的其他人：

UPDATE table
    SET column1 = CASE 
        WHEN column2 = test AND column3 = 1 THEN 100
        WHEN (column2 LIKE '%test1%' OR column2 LIKE '%test2%') AND column3 = 2 THEN 50
        ELSE 0
    END

Answer 1

在案例之后删除“column2，column3”并尝试关注事物，

UPDATE table
    SET column1 = CASE WHEN column2 == test AND column3 == 1 THEN 100
        WHEN (column2 LIKE '%test1%' OR column2 LIKE '%test2%') AND column3 == 2 THEN 50
        ELSE 0
    END

以下是指导您了解CASE声明的更多信息的链接： http://dev.mysql.com/doc/refman/5.0/en/case.html

MySQL CASE从多列+ LIKE更新一列

1 个答案: