SQL中的字符串模式匹配

Question

Please help me out in writing a generic SQL query for the below scenarios. Based on the data in the table2 the output is decided.For Eg1, if AB* is present in table2,the output would be AB01,AB02. Eg2 - AB02 is present in Table2, only AB02 is in output Eg3 - * is present in Table2, all the data in Table1 is in output

Scenario 1

Table1  
AB01  
AB02  
BE01  
GH01  

Table2  
AB*

Output  
AB01  
AB02 

---

Scenario 2

Table1  
AB01  
AB02  
BE01  
GH01  

Table2  
AB02

Output   
AB02

---

Scenario 3

Table1

AB01  
AB02  
BE01  
GH01  

Table2  
*

Output  
AB01  
AB02  
BE01  
GH01  

Answer 1

Use rlike on a cross join between the tables:

select * 
  from table1 t1, table2 t2
  where t1.col1 rlike t2.col2;

You may need to tweak your expressions in table2 to become standard regex patterns, but that should be easy. See https://dev.mysql.com/doc/refman/8.0/en/regexp.html

Answer 2

这应该为您工作：

select a.* from table1 a join table2 b on a.field like '%'+replace(b.field,'*','')+'%'