Updating column name in sql
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.ALTER TABLE My Table DROP COLUMN My Old Column; For the very simplest of cases (no constraints, triggers, indexes or keys), it will take the above 3 lines.For anything more complicated it can get very messy as you fill in the missing parts.In this article we will cover the following: To understand table column rename using SP_RENAME with extensive list of examples, let us first create a Customer table with sample records as depicted in the below image by using the following script: Script: USE TEMPDB GO --Create Customer Table for the Demo CREATE TABLE dbo.] VARCHAR(20), [Zip Code] VARCHAR(10), [City.
Name]) VALUES(1,' Basavaraj Biradar', '123-123', '560001', ' Bangalore'), (2,' Shreeganesh Biradar', '321-321', '560025', ' Mysore') GO --Create Procedure to get all the records from customer table CREATE PROCEDURE dbo. Get Customers GO Result: Below is the pictorial representation of the table column rename using SP_RENAME Basically, sql server returns this warning to alert us to update all the places wherever we are referring this column.]]
We can use the SP_RENAME system stored to change/rename the table column name.My copy of the SQL 9003 standard does not show it as being standard (amongst other things, RENAME is not one of the keywords). Would you like to answer one of these unanswered questions instead?All INSTEAD OF triggers are fired for each row and you cannot narrow down the event by column.The NULL-ing of First Name doesn’t happen before or after we set Last Name to First Name. Try this statement: If SQL Server had to pick an order to update the columns, this flipping of data would fail.Instead, it sets the Last Name to whatever the First Name happens to be before the update runs.
The order of columns in an UPDATE statement doesn’t matter.