Question

我有一张包含这些结构的表格：

Field A     FieldB                  FieldC
material    clay,rush
material    air
metal       iron
metal       gold,silver,aluminium

我需要做的是填写C字段。为此，我必须进行如下查询：

select xxxxx from yyyyy where jjjjj in (material, clay, rush) 
select xxxxx from yyyyy where jjjjj in (material, air) 
select xxxxx from yyyyy where jjjjj in (metal, iron) 
select xxxxx from yyyyy where jjjjj in (metal, gold, silver, aluminum)

yyyy是另一张桌子。

可以使用pl / sql Oracle制作这些吗？我一直在尝试，但我没有能力，似乎有点混乱。谢谢和问候，

Answer 1

这对你有用

DECLARE 
l_query VARCHAR(500);  
BEGIN
    FOR i in (SELECT FiledA, FiledB, FiledA||','||FiledB  AS  FiledC FROM test)
    LOOP
        l_query :=  'SELECT xxxxx FROM yyyyy WHERE jjjjj IN ';
        l_query := l_query||'('||i.FiledC||')';
        UPDATE  test
           SET FiledC = l_query
        WHERE FiledA = i.FiledA
          AND FiledB = i.FiledB;
        l_query := NULL;  
    END LOOP;
    COMMIT;
END;
/

尝试用逗号分隔的寄存器进行查询

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