Question

我有5个表，比如t1，t2，t3，t4，t5。所有这些表都有相同的列名，即“＃NAME＆＃39;”。现在为每个表＆＃39; NAME＆＃39;列是唯一的，但可以在两个或两个以上的表上重复。我想找到常见的名字＆＃39;以及他们在哪些桌子上。在UNION ALL之后，我得到了这样的Image after doing UNION ALL

结果应显示＆＃39; sona＆＃39;和＆＃s; sonali＆＃39;以及这些值存在的表格

Answer 1

试试这个

select 1 
from (
    select name as name from tbl1
    union all
    select name from tbl2
    union all
    select name from tbl3
    union all
    select name from tbl4
    union all
    select name from tbl5
) a
where name = 'someuser'

Answer 2

"SELECT t1.NAME, '' AS 'TABLE' FROM (select NAME from client1 UNION ALL select NAME from client2  UNION ALL select NAME from client3 "
                "UNION ALL select NAME from client4 UNION ALL select NAME from client5) t1 "
                " WHERE (select count(*) FROM (select NAME from client1 UNION ALL select NAME from client2  UNION ALL select NAME from client3 "
                "UNION ALL select NAME from client4 UNION ALL select NAME from client5) t2 WHERE t1.NAME=t2.NAME)>1 GROUP BY NAME ORDER BY NAME"

有了这个，我可以找到通用名称，但找不到它们属于哪个表。

如何使用sqlite从多个表中获取列（名称）的公共值

2 个答案: