${if(,"","")}
我想要的效果是if(条件A=1 and 条件B=1," 执行SQL"," ") 这种的应该如何写
$if(条件A=1 && 条件B=1,"select * from 表","sql22")}
${if(and(条件A=1,条件B=1),"select * from 表","sql22")}
${if(and(条件A=1,条件B=1)," 执行SQL"," ")}