How to use UNION ALL In SQL || Understanding about UNION ALL in SQL || Union All IN SQL || SQL

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In this course we will talk about the use of UNION All Operator in SQL

UNION ALL Operator:
In previous video, we have discussed about the UNION Operator.
The UNION operator selects only distinct values if you have comon. To allow duplicate values, use UNION ALL

UNION ALL Syntax:
The UNION operator selects only distinct values by default. To allow duplicate values, use UNION ALL
SELECT column_name(s) FROM table1
UNION ALL
SELECT column_name(s) FROM table2;

SQL Query:

SELECT
'Customer-01' AS Customer

UNION ALL

SELECT
'Customer-02' AS Customer

UNION ALL

SELECT
'Customer-02' AS Customer

------------------

SELECT
500.00 AS MobileBill
, 500.00 AS MonthlyFoodAllowance

UNION ALL

SELECT
600.00 AS MobileBill
, 460.00 AS MonthlyFoodAllowance

UNION ALL

SELECT
200.00 AS MobileBill
, 250.00 AS MonthlyFoodAllowance

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