Combine two tables T-SQL

Question

Hi there,
It might be simple Query for you but I was missing the logic.
I have Tab A    this does have 4 records.
           Tab B  this does have 14 records.
Note: those 4 records exists in Tab B
I want to insert rest of the 10 records into the Tab A.
Any suggestion pls.
Thanks,
Siva 

Answer 1

Hi,
Please run the below script and see if it serves your requirement.
DECLARE @TableA TABLE
ID INT,
NAME VARCHAR(10)
INSERT INTO @TableA 
VALUES   (1, 'James')
,(2, 'Ramz')
,(3, 'Chandu')
,(4, 'Suraj')
SELECT *
FROM @TableA
DECLARE @TableB TABLE
ID INT,
NAME VARCHAR(10)
INSERT INTO @TableB 
VALUES   (1, 'James')
,(2, 'Ramz')
,(3, 'Chandu')
,(4, 'Suraj')
,(5, 'Krishna')
,(6, 'John')
SELECT *
FROM @TableB
Now as per your requirement, you need to insert rows 5 & 6 from TableB into TableA
INSERT INTO @TableA
SELECT Tab1.* 
FROM @TableB Tab1
LEFT JOIN @TableA Tab2 ON Tab1.id = Tab2.id
WHERE Tab2.id IS NULL
The above query gives inserts the non-existing records 
SELECT *
FROM @TableA
Thanks, Satish Chandra