我的查询运行良好。但现在有一种情况,我必须在 case 语句中加入 2 个查询。但问题是其中一个查询已在使用。所以我的问题是如何在一个 sql 中添加这两个 sql
我原来的sql是
SELECT
tc.dentist_id,md.vendor_no,pl.pack_trans_id,tc.agent_dentist,md.company_name,md.contact,md.phone_no,sql1.image_path,sql1.metal_id,sql1.expect_more,sql1.how_long_acquire,tc.check_amt,tc.check_date_sent,tc.check_no
FROM tbl_check tc
LEFT JOIN tbl_mst_dentist md ON tc.dentist_id=md.dentist_id
LEFT JOIN tbl_pack_list pl ON tc.pack_id=pl.pack_id
LEFT JOIN (SELECT image_path,pack_id,metal_id,expect_more,how_long_acquire FROM
tbl_metals_list GROUP BY pack_id
)sql1 ON tc.pack_id=sql1.pack_id
WHERE tc.sale_agent_id = '3' AND tc.paying_percent !=0
现在我必须在上面的语句中添加 2 条 sql 语句
if(tc.agent_dentist=a) select sa.* ,sm.state_code from tbl_sales_agent
as sa,tbl_mst_state as sm where sa.sales_agent_id = '3' AND
sa.state=sm.state_name else select * from tbl_mst_dentist where
dentist_id =tc.dentist_id
第二张桌子已经在使用了。有可能吗?提前致谢