错误代码：1292 - 截断不正确的 DOUBLE 值：'-'

Question

SET @newNum = IF(
    RIGHT("-600.00",1) REGEXP '^[-]' = '-',
    REPLACE("-600.00",",",""),
    -1*REPLACE(REPLACE("-600.00",",",""),"-","")
);

执行此行时，我不断收到截断的不正确 DOUBLE 值：'-'，有人知道是什么原因造成的吗？

Answer 1

REGEXP returns 1 或 0 取决于是否匹配。将结果与 - 进行比较是不正确的，您可以这样做：

DECLARE @oldNum VARCHAR(10);
DECLARE @newNum VARCHAR(10);
SET @oldNum = '600.00-';
SET @newNum = IF(
    RIGHT(@oldNum, 1) = '-',
    CONCAT('-', REPLACE(REPLACE(@oldNum, ',', ''), '-', '')),
                        REPLACE(@oldNum, ',', '')
);
SELECT @oldNum, @newNum