根据来自第一个表的第二个数字值联接两个表

Question

I am new to SQL, so please bear with me.

I am working with two tables that do not have common fields. I am trying to create simple hierarchy based on the two tables that look like this:

   Table 1. 

Cul 1   Cul 2 
============== 
S10000  Name 
S20000  Name 1 
S30000  Name 2 
S40000  Name 3

 Table 2 

Cul 1   Cul 2  
=====================
A10000  Test 
A10001  Test 123 
A20000  Test 1
A20001  Test 999 
A30000  Test 2  
A30002  Test 5555 
A40000  Test 3   
A40006  Test 84384848

I would like to write a query that will display 'Name' field from Table 1 based on matching numeric values in the first columns from table 1 & 2.

So if Table 1 is S10000, display A1000 – Test

Is that possible?

Thank you

Answer 1

Your requirements are not exactly clear but it sounds like you want this:

select t1.col1 t1Name,
  t1.col2 t1Value,
  t2.col1 t2Name,
  t2.col2 t2Value
from table1 t1
inner join table2 t2
  on substring(t1.col1, 2, 1) = substring(t2.col1, 2, 1)

see SQL Fiddle with Demo

edit, you can also use:

select t1.col1 t1Name,
  t1.col2 t1Value,
  t2.col1 t2Name,
  t2.col2 t2Value
from table1 t1
inner join table2 t2
  on substring(t1.col1, 2, len(t1.col1)) 
      = substring(t2.col1, 2, len(t2.col1));

Answer 2

SELECT
   t2.*
FROM Table1 t1
INNER JOIN Table2 t2 on SUBSTRING(t1.Cul1,2,LEN(t1.Cul1)-1)=SUBSTRING(t2.Cul1,2,LEN(t2.Cul1)-1)

Answer 3

If you are very sure that the first digit will be the digit and followed by the numeric then the below should work

SELECT A.cul1,B.cul2 
FROM dbo.Table1 A, dbo.Table2 B
WHERE substring(A.cul1,2,len(A.cul1))= substring(B.cul1,2,len(B.cul1))