求助:我一个表A里有地个字段a b,现在数据有一部分存反了。 怎么换过来
求助:我一个表A里有地个字段a b,现在数据有一部分存反了。 怎么换过来
也就是b里面数据存到更新到a里。(这个会写 下一个我就会写了),还请高手指点一下。
------解决方案--------------------
- SQL code
set @tmp=""; update table set field_a=(@tmp:=field_a), field_a=field_b,field_b=@tmp where …… <br><font color="#e78608">------解决方案--------------------</font><br>建议用sqlyog,直接将多条语句全部执行。http://download.csdn.net/detail/dmtnewtons/4230136<br>
- SQL code
update A set A.a="new_data_a",A.b="new_data_b" where A.a="old_data_a" and A.b="old_data_b"; …… <br><font color="#e78608">------解决方案--------------------</font><br>把字段名换了 <br><font color="#e78608">------解决方案--------------------</font><br>棒!<br><br>

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