SQL：将一列的字符串与另一个表列的子串匹配

Question

我有两个表t1和t3。如果t1字符串出现在t2字符串中，我需要t3具有t1字符串。

t1-[mango, apple, Top] 
t2-[{Ate mango}, {it was nice apple},{you are hero}, {apple shares top}] 

如果T1的串t2的子字符串匹配，那么T3将 输出为T3

t3-[mango, apple, , {apple,top}] 

Answer 1

Select 
SecondCol Result 
From 
(
Select 
Col2 FirstCol, 
UPPER(LISTAGG(Col1, ', ') WITHIN GROUP (ORDER BY Col2)) SecondCol 
From 
(Select Table1.T1 Col1, Table2.T1 Col2 From Table1,Table2 
Where 
Length(REGEXP_SUBSTR(UPPER(Table2.T1), UPPER(Table1.T1)))<>0 
) 
Group By Col2 
);