使SQL查詢

Question

輸入數據

+---------+----------------+-----------+-----------------+--------------+------+ 
| country | tgtschema_name | tablename | tgttableversion | col_function | flag | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| zz  | abc_zz   | table1 | 01    | TBD1   | no | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| bs  | abc_bs   | table2 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| bs  | abc_bs   | table3 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| bs  | abc_bs   | table4 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| bs  | abc_bs   | table4 | 02    | TBD2   | no | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| do  | abc_do   | table5 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| do  | abc_do   | table6 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| do  | abc_do   | table7 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 

輸出所需的數據

+---------+----------------+-----------+-----------------+--------------+------+ 
| country | tgtschema_name | tablename | tgttableversion | col_function | flag | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| zz  | abc_zz   | table1 | 01    | TBD1   | no | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| bs  | abc_bs   | table2 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| bs  | abc_bs   | table3 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| bs  | abc_bs   | table4 | 02    | TBD2   | no | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| do  | abc_do   | table5 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| do  | abc_do   | table6 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 
| do  | abc_do   | table7 | 01    | TBD1   | yes | 
+---------+----------------+-----------+-----------------+--------------+------+ 

如果我在國內多條記錄，tgtschema_name和表名列然後我需要有一個記錄其標誌爲「否」。

Answer 1

編輯：答案提供時不知道具體的數據庫。

這樣的事情應該工作，假設你有id字段：

select * 
from t t1 
where not exists (
    select country 
    from t t2 
    where t1.id != t2.id 
    t1.country = t2.country and 
    (...add the rest here...) and 
    t2.flag = 'No' 
) 

的想法是，你得到的所有數據，除非你用標誌具有相同屬性的第二項「不」要省略另一個。