php - 如何在mysql中连接4个表？

Question

我创建了一个用于搜索 session 日期的表单。默认表单显示仅显示今天的数据 = now()。我如何查询搜索 session 日期包括 4 个表(每个表都有一个相同的列:create)

Answer 1

试试下面的代码..

SELECT M.*,A.*,W.*,D.* FROM Mch as M
    INNER JOIN Assy as A ON M.creadate=A.creadate 
    INNER JOIN WHS as W ON A.creadate=W.creadate 
    INNER JOIN DLV as D ON W.creadate=D.creadate