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                SQL文件語法 === ### IF注解(comment) 使用IF注解,可以根據相應的條件改變要執行的SQL指令。 IF注解的記法如下: ``` <#if condition>...? <#elseif condition2>...? <#elseif condition3>......? <#else>.. ``` 例: ``` <#if employee.empno ?exists> and empno = '${employee.empno}' </#if> ``` 作為IF注解的條件為假的處理部分,使用ELSEIF注解。 條件為假的場合,使用<#else>..之后的部分 ### freemaker語法說明 Mnidao 標簽能力非常強大,支持 if、else、list 、switch、include、宏的各種標簽,甚至可以寫代碼。 更多標簽能力請參考 [freemaker語法](https://blog.csdn.net/zhangdaiscott/article/details/77505453)
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