在 Oracle SQL 中将两个表合并为一个

Question

我有两张表，每张都有很多属性。每个都有我想要的属性，我正在尝试编写一个查询来获取这些属性，并将它们放入三列中。

表 A

LOCATION_NUMBER (varchar2(20Byte)), 
BEGIN (NUMBER (3,0)), 
BEGIN_DEC (NUMBER (4,3)), 
END (NUMBER (3,0)), 
END_DEC (NUMBER (4,3))

表 B

LOCNUM (NUMBER (15,0)), 
START (VARCHAR2(6 BYTE)), 
START_POS (NUMBER (5,3)), 
FINISH (VARCHAR2 (6 BYTE)), 
FINISH_POS (NUMBER (5,3)).

我想要从查询中得到一个表，具有三个属性，然后首先按位置对这些表进行排序，然后再开始。

表C，

LOCATION, 
START, 
END

这是一个例子：

答：

LOCATION_NUMBER    BEGIN    BEGIN_DEC    END    END_DEC
      I 26          8          0.63       13      0.99
      I 32          144        0          151     0.82
      I 35          22         0.29       55      0.09
      I 35          128        0.1        67      0.9
      I 35          0          0          22      0.28        

乙：

LOC_NUM            START    START_POS    FINISH  FINSIH_POS
      227           98         0.56       100     0
      35            149        0.25       151     0.55
      96            156        0.23       156     1.26
      11            263        2.56       263     4.52

结果集：

LOCATION       START        END
    26          8.63         13.99
    32          144          151.82
    35          22.29        55.09
    35          128.1        67.9
    35          0            22.28   
    227         98.56        100
    35          149.25       151.55
    96          156.23       157.26
    11          265.56       267.52

我尝试了一些查询我能够从每个表中获得所需的结果，我只需要知道如何将它们组合成一个，以使我想要的表更容易，再次，每个表表还有 10 到 20 个我不想担心的属性。

Select to_number(trim(regexp_substr(A.LOCATION_NUMBER ,'[^ ]+', 1, 2))) AS LOCATION,
(to_number(trim(A.BEGIN)) + to_number(trim(A.BEGIN_DEC))) AS START,
(to_number(trim(A.END)) + to_number(trim(A.END_DEC))) AS END
FROM A
ORDER BY to_number(trim(regexp_substr(A.LOCATION_NUMBER,'[^ ]+', 1, 2)));

SELECT B.LOC_NUM AS LOCATION,
(to_number(trim(B.START)) + to_number(trim(B.START_POS))) AS START,
(to_number(trim(B.FINISH)) + to_number(trim(B.FINISH_POS))) AS END
FROM B
ORDER BY B.LOCATION, START;

Answer 1

假设您的查询有效，您只需要union all：

Select to_number(trim(regexp_substr(A.LOCATION_NUMBER ,'[^ ]+', 1, 2))) AS LOCATION,
       to_number(trim(A.BEGIN)) + to_number(trim(A.BEGIN_DEC)) AS START,
       to_number(trim(A.END)) + to_number(trim(A.END_DEC)) AS END
FROM A
UNION ALL
SELECT B.LOC_NUM AS LOCATION,
       to_number(trim(B.START)) + to_number(trim(B.START_POS)) AS START,
       to_number(trim(B.FINISH)) + to_number(trim(B.FINISH_POS)) AS END
FROM B
ORDER BY B.LOCATION, START;