與多個連接MySQL查詢

Question

我有下面的表，並試圖檢索至少一列（lay，blk，pri，ani）應該有'1863'，但結果不符合要求的數據。

在這裏，我張貼表以供參考。

DROP TABLE IF EXISTS my_table; 
CREATE TABLE my_table 
(id INT NOT NULL AUTO_INCREMENT UNIQUE, 
Shot VARCHAR(4), 
lay VARCHAR(15) NOT NULL, 
lay_status VARCHAR(15) NOT NULL, 
blk VARCHAR(10) NOT NULL, 
blk_status VARCHAR(15) NOT NULL, 
pri VARCHAR(10) NOT NULL, 
pri_status VARCHAR(15) NOT NULL, 
ani VARCHAR(10) NOT NULL, 
ani_status VARCHAR(15) NOT NULL 
); 

INSERT INTO my_table VALUES 
(1,'SH01','1863','yes','1863','yes','P4645','yes','P4557','yes'), 
(2,'SH02','1863','yes','P4645','no','P4557','yes','1863','no'), 
(3,'SH03','P4645','yes','P4557','yes','1863','yes','1863','yes'), 
(4,'SH04','1863','no','P4645','no','P4557','yes','1863','yes'), 
(5,'SH05','1863','yes','1863','yes','P4645','yes','P4557','yes'), 
(6,'SH06','P4557','yes','P4645','yes','P4645','yes','P4557','yes'); 

SELECT * FROM my_table; 
+----+------+-------+------------+-------+------------+-------+------------+-------+------------+ 
| id | Shot | lay | lay_status | blk | blk_status | pri | pri_status | ani | ani_status | 
+----+------+-------+------------+-------+------------+-------+------------+-------+------------+ 
| 1 | SH01 | 1863 | yes  | 1863 | yes  | P4645 | yes  | P4557 | yes  | 
| 2 | SH02 | 1863 | yes  | P4645 | no   | P4557 | yes  | 1863 | no   | 
| 3 | SH03 | P4645 | yes  | P4557 | yes  | 1863 | yes  | 1863 | yes  | 
| 4 | SH04 | 1863 | no   | P4645 | no   | P4557 | yes  | 1863 | yes  | 
| 5 | SH05 | 1863 | yes  | 1863 | yes  | P4645 | yes  | P4557 | yes  | 
| 6 | SH06 | P4557 | yes  | P4645 | yes  | P4645 | yes  | P4557 | yes  | 
+----+------+-------+------------+-------+------------+-------+------------+-------+------------+ 
6 rows in set (0.00 sec) 

我有我創建了一個查詢及其結果如下

SELECT 
    x.Shot, 
    IFNULL(J1.Stage,'NA') as Stage1, 
    IFNULL(J1.status,'NA') as Status, 
    IFNULL(J2.Stage,'NA') as Stage2, 
    IFNULL(J2.status,'NA') as Status, 
    IFNULL(J3.Stage,'NA') as Stage3, 
    IFNULL(J3.status,'NA') as Status, 
    IFNULL(J4.Stage,'NA') as Stage4, 
    IFNULL(J4.status,'NA') as Status 
FROM 
    (SELECT 
     Shot 
    FROM 
     my_table) x 
    LEFT JOIN (SELECT 
     Shot, 
     lay as Artist, 
     lay_status as status, 
     'lay' as Stage 

    FROM 
     my_table where lay = '1863') J1 ON J1.Shot = x.Shot 
    LEFT JOIN (SELECT 
     Shot, 
     blk as Artist, 
     blk_status as status, 
     'blk' as Stage 

    FROM 
     my_table where blk = '1863') J2 ON J2.Shot = x.Shot 
    LEFT JOIN (SELECT 
     Shot, 
     pri as Artist, 
     pri_status as status, 
     'pri' as Stage 

    FROM 
     my_table where pri = '1863') J3 ON J3.Shot = x.Shot 
    LEFT JOIN (SELECT 
     Shot, 
     ani as Artist, 
     ani_status as status, 
     'ani' as Stage 

    FROM 
     my_table where ani = '1863') J4 ON J4.Shot = x.Shot 

上述查詢的結果是

+------+--------+--------+--------+--------+--------+--------+--------+--------+ 
| Shot | Stage1 | Status | Stage2 | Status | Stage3 | Status | Stage4 | Status | 
+------+--------+--------+--------+--------+--------+--------+--------+--------+ 
| SH01 | lay | yes | blk | yes | NA  | NA  | NA  | NA  | 
| SH02 | lay | yes | NA  | NA  | NA  | NA  | ani | no  | 
| SH03 | NA  | NA  | NA  | NA  | pri | yes | ani | yes | 
| SH04 | lay | no  | NA  | NA  | NA  | NA  | ani | yes | 
| SH05 | lay | yes | blk | yes | NA  | na  | NA  | NA  | 
| SH06 | NA  | NA  | NA  | NA  | NA  | NA  | NA  | NA  | 
+------+--------+--------+--------+--------+--------+--------+--------+--------+ 

但我需要檢索的記錄，其中至少在lay，blk，pri，ani中有一個'1863'，但是上面的查詢已經返回了帶有SH06的記錄，其中非字段（lay，blk，pri，ani）具有'1863'

所需的結果是類似下面

+------+--------+--------+--------+--------+--------+--------+--------+--------+ 
| Shot | Stage1 | Status | Stage2 | Status | Stage3 | Status | Stage4 | Status | 
+------+--------+--------+--------+--------+--------+--------+--------+--------+ 
| SH01 | lay | yes | blk | yes | NA  | NA  | NA  | NA  | 
| SH02 | lay | yes | NA  | NA  | NA  | NA  | ani | no  | 
| SH03 | NA  | NA  | NA  | NA  | pri | yes | ani | yes | 
| SH04 | lay | no  | NA  | NA  | NA  | NA  | ani | yes | 
| SH05 | lay | yes | blk | yes | NA  | NA  | NA  | NA  | 
+------+--------+--------+--------+--------+--------+--------+--------+--------+ 

Answer 1

試試這個，雖然我覺得狀態3您預期的結果可能是錯誤的：

SELECT 
    Shot, 
    CASE lay WHEN 1863 THEN 'lay' ELSE 'NA' END AS 'Stage1', 
    CASE WHEN lay=1863 THEN lay_status ELSE 'NA' END AS 'Status-lay', 
    CASE blk WHEN 1863 THEN 'blk' ELSE 'NA' END AS 'Stage2', 
    CASE WHEN blk=1863 THEN blk_status ELSE 'NA' END AS 'Status-blk', 
    CASE pri WHEN 1863 THEN 'pri' ELSE 'NA' END AS 'Stage3', 
    CASE WHEN pri=1863 THEN pri_status ELSE 'NA' END AS 'Status-pri', 
    CASE ani WHEN 1863 THEN 'ani' ELSE 'NA' END AS 'Stage4', 
    CASE WHEN ani=1863 THEN ani_status ELSE 'NA' END AS 'Status-ani' 
FROM 
    my_table 
WHERE 
    lay = 1863 
OR 
    blk = 1863 
OR 
    pri = 1863 
OR 
    ani = 1863 

這得出以下結果：

| SHOT | STAGE1 | STATUS-LAY | STAGE2 | STATUS-BLK | STAGE3 | STATUS-PRI | STAGE4 | STATUS-ANI | 
------------------------------------------------------------------------------------------------ 
| SH01 | lay |  yes | blk |  yes |  NA |   NA |  NA |   NA | 
| SH02 | lay |  yes |  NA |   NA |  NA |   NA | ani |   no | 
| SH03 |  NA |   NA |  NA |   NA | pri |  yes | ani |  yes | 
| SH04 | lay |   no |  NA |   NA |  NA |   NA | ani |  yes | 
| SH05 | lay |  yes | blk |  yes |  NA |   NA |  NA |   NA | 

http://sqlfiddle.com/#!2/ef7d9/31/0