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SQL的有关问题
- WBOYOriginal
- 2016-06-13 13:28:32845browse
SQL的问题
我mysql 这3个字段都在一个表中 有一个字段rd的值 是字段out的值减去字段pv的值 这个rd字段怎么弄
------解决方案--------------------
- SQL code
update tt set rd=`out`-`pv`; <div class="clear">
</div>
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