Insert into a table with unique columns from another table.

Question

There are two tables,
STG_DATA                                                          
ORDER_NO    DIR_CUST_IND
1002                     DNA
1005                     GEN
1005    
1008                     NULL
1001                     NULL
1001                     NULL
1006                     NULL
1000                     ZZZ
1001                     ZZZ
FACT_DATA
ORDER_NO    DIR_CUST_IND
1005                      NULL
1006                      NULL
1008                      NULL
I need to insert only unique [ORDER_NO] from STG_DATA to FACT_DATA with corresponding [DIR_CUST_IND]. Though STG_DATA has multiple rows with same ORDER_NO, I need to insert only one of that it can be any record.
Sarvan

Answer 1

CREATE TABLE #Level(ORDER_NO INT, DIR_CUST_IND CHAR(3))
INSERT #Level
SELECT 1002,'DNA' UNION
SELECT 1005,'GEN' UNION
SELECT 1005,NULL UNION
SELECT 1008,NULL UNION
SELECT 1001,NULL UNION
SELECT 1001,NULL UNION
SELECT 1006,NULL UNION
SELECT 1000,'ZZZ' UNION
SELECT 1001,'ZZZ'
SELECT ORDER_NO,DIR_CUST_IND
FROM( SELECT ROW_NUMBER()OVER(PARTITION BY ORDER_NO ORDER BY ORDER_NO) RowNum,*
FROM #Level)A
WHERE RowNum=1
I hope this would give you enough idea. All you have to do is just write insert statement.
Next time please post DDL & DML.
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