MySQL has an if syntax ( if(action=2 and state=0, 1, 0) ), but case is more universal. Note that the as state there is just aliasing the column. ... <看更多>
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MySQL has an if syntax ( if(action=2 and state=0, 1, 0) ), but case is more universal. Note that the as state there is just aliasing the column. ... <看更多>
... <看更多>
You can use dynamic sql for this purpose. The if statement chekcm if there are markups if so it tales the firwst query into a user defined ... ... <看更多>