为此查询优化SQL语句？

Question

我有两个表T1和T2。

T1有ID，F1，F2，F3，F4，F5，F6，F7，F8

T2具有ID，T1_ID，F1，F2，F3，F4，F5，F6，F7，F8，SUM

实例数据为T1和T2

T1 
ID,F1,F2,F3,F4,F5,F6,F7,F8 
    1, 1, 2, 3, 0, 0, 5, 0, 0 
    2, 0, 0, 0, 1, 0, 4, 5, 0 
    3, 4, 1, 3, 2, 0, 0, 0, 5 
    4, 1 ,3, 4, 0, 0 ,0, 0, 0 
    5, 7, 2, 1, 3, 0, 0, 0, 0 
    . 
    . 
    . 
T2 
ID,T1_ID,F1,F2,F3,F4,F5,F6,F7,F8,SUM 
    1, 1, 2, 3, 5, 0, 0, 3, 0, 0,100 
    2, 5, 9, 8, 8, 1, 0, 0, 0, 0,200 
    3, 2, 0, 0, 0, 5, 0, 6, 6, 0,300 
    4, 1 ,3, 4, 2, 0 ,0, 3, 0, 0,255 
    5, 4, 8, 8, 8, 0, 0, 0, 0, 0,155 
    . 
    . 

SELECT * FROM T 2，其中T1.F1 .... T1.F8具有（1和2和3）

查询必须返回记录1， 2,4

1, 1, 2, 3, 5, 0, 0, 3, 0, 0,100 
    2, 5, 9, 8, 8, 1, 0, 0, 0, 0,200 
    4, 1 ,3, 4, 2, 0 ,0, 3, 0, 0,255 

我创建这个查询

Select T2.ID,T2.F1,T2.F2,T2.F3,T2.F4.T2.F5,T2.F6,T2.F7,T2.F8,T2.SUM,T1.ID 
from T2 
join T1 on T1.ID = T2.T1_ID 
    where 
    (CASE WHEN (T1_ID.F1 = 1) THEN T2.F1 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 2) THEN T2.F1 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 3) THEN T2.F1 between 0 and 1000 end) 
    or 
    (CASE WHEN (T1_ID.F1 = 1) THEN T2.F1 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F2 = 2) THEN T2.F2 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 3) THEN T2.F1 between 0 and 1000 end) 
    or 
    (CASE WHEN (T1_ID.F1 = 1) THEN T2.F1 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F3 = 2) THEN T2.F3 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 3) THEN T2.F1 between 0 and 1000 end) 
    or 
    (CASE WHEN (T1_ID.F1 = 1) THEN T2.F1 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F4 = 2) THEN T2.F4 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 3) THEN T2.F1 between 0 and 1000 end) 
    . 
    . 
    . 
    or 
    (CASE WHEN (T1_ID.F2 = 1) THEN T2.F2 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 2) THEN T2.F1 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 3) THEN T2.F1 between 0 and 1000 end) 
    or 
    (CASE WHEN (T1_ID.F2 = 1) THEN T2.F2 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F2 = 2) THEN T2.F2 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 3) THEN T2.F1 between 0 and 1000 end) 
    or 
    (CASE WHEN (T1_ID.F2 = 1) THEN T2.F2 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F3 = 2) THEN T2.F3 between 0 and 1000 end) 
and(CASE WHEN (T1_ID.F1 = 3) THEN T2.F1 between 0 and 1000 end) 
    . 
    . 
    . 

这是太大的语句。 如何优化语句？

Answer 1

SELECT * FROM T2 
WHERE EXISTS ( SELECT N.ID 
       FROM( SELECT T1.ID , T1.F1 AS F 
          FROM T1 
          UNION ALL 
          SELECT T1.ID , T1.F2 AS F 
          FROM T1 
          UNION ALL 
          SELECT T1.ID , T1.F3 AS F 
          FROM T1 
          UNION ALL 
          SELECT T1.ID , T1.F4 AS F 
          FROM T1 
          UNION ALL 
          SELECT T1.ID , T1.F5 AS F 
          FROM T1 
          UNION ALL 
          SELECT T1.ID , T1.F6 AS F 
          FROM T1 
          UNION ALL 
          SELECT T1.ID , T1.F7 AS F 
          FROM T1 
          UNION ALL 
          SELECT T1.ID , T1.F8 AS F 
          FROM T1 
          UNION ALL 
         ) N 
       WHERE N.F IN (1, 2, 3) 
         AND N.ID = T2.T1_ID 
       GROUP BY N.ID 
       HAVING COUNT(DISTINCT N.F) = 3 
     );