添加乘法连接

Question

如何添加乘法连接。

Answer 1

您需要将其添加为 left join，因为条件是现有 left join 中的第二个 table。所以这个 FROM 子句应该有效：

FROM tbl_agen_sala_hora  thLEFT JOIN
     tbl_agen_sala ts
     ON th.des_hora_inil = ts.des_hora_inil AND
        th.des_hora_finl = ts.des_hora_finl AND
        ts.des_dia      =  @p_des_dia AND
        ts.des_mes      =  @p_des_mes AND
        ts.des_ano      =  @p_des_ano AND
        ((ts.num_sala   =  @p_num_sala) OR (@p_num_sala = 0)) AND
        ts.num_sala     =  @p_num_sala LEFT JOIN
     TBL_INTR_USUA tu
     ON tu.des_logi = ts.des_logi_manu LEFT JOIN
     tbl_agen_sala_sala ss
     ON ts.num_sala = ss.num_sala

添加乘法连接

Adding a Multiplies joins

sql

stored-procedures

procedures