Updating column name in sql

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In this scenario, the sp will start throwing error post the column rename.

To avoid such issues, Sql server alerts us by returning the warning when we use SP_RENAME.

Modify the clause to make sure that a column is updated only once.

If this statement updates or inserts columns into a view, column aliasing can conceal the duplication in your code.

Name] VARCHAR(50)) GO --Add sample records to the Customer table INSERT INTO dbo.

Customer(id, Cust Name,

A column cannot be assigned more than one value in the same clause.

Sometimes, Management Studio’s error messages are vague and unhelpful, but this one is pleasantly straightforward: Limit one change per column.

The UPDATE statement can’t pick a winner between the two instructions because they execute at the same time.

SQL select * from Employee 2 / ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION ---- -------------------- -------------------- --------- --------- ---------- ---------- --------------- 01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester 04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester 8 rows selected.

If you omit the WHERE clause, all records in the table will be updated!

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A column cannot be assigned more than one value in the same clause.

Sometimes, Management Studio’s error messages are vague and unhelpful, but this one is pleasantly straightforward: Limit one change per column.

The UPDATE statement can’t pick a winner between the two instructions because they execute at the same time.

SQL select * from Employee 2 / ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION ---- -------------------- -------------------- --------- --------- ---------- ---------- --------------- 01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester 04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester 8 rows selected.

If you omit the WHERE clause, all records in the table will be updated!

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A column cannot be assigned more than one value in the same clause.Sometimes, Management Studio’s error messages are vague and unhelpful, but this one is pleasantly straightforward: Limit one change per column.The UPDATE statement can’t pick a winner between the two instructions because they execute at the same time.SQL select * from Employee 2 / ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION ---- -------------------- -------------------- --------- --------- ---------- ---------- --------------- 01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester 04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester 8 rows selected. If you omit the WHERE clause, all records in the table will be updated!

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