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Home 2018 December SQL Server: If a Column Exists in a Table, don’t add it

SQL Server: If a Column Exists in a Table, don’t add it

This article is half-done without your Comment! *** Please share your thoughts via Comment ***

In this post, I am sharing two options for checking whether a column exists in a SQL Server table or not.
When you are preparing the full database change script, you should put DDL statements in the IF EXISTS condition for avoiding any error.

Option 1: Check the column existence and add id

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if not exists
(
select column_name
from INFORMATION_SCHEMA.columns
where table_name = 'table_name'
and column_name = 'new_column_name'
)
 
ALTER TABLE table_name add new_column_name TEXT

Option 2: Check the column existance

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IF COL_LENGTH('table_name','column_name') IS NULL
BEGIN
/*Write your code...*/
END

Dec 10, 2018Anvesh Patel
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Anvesh Patel
Anvesh Patel

Database Engineer

December 10, 2018 SQL ServerAnvesh Patel, Column Existence, Column Exists, database, database research and development, dbrnd, SQL Query, SQL Server, SQL Server Administrator, SQL Server Error, SQL Server Monitoring, SQL Server Performance Tuning, SQL Server Programming, SQL Server Tips and Tricks, TSQL
About Me!

I'm Anvesh Patel, a Database Engineer certified by Oracle and IBM. I'm working as a Database Architect, Database Optimizer, Database Administrator, Database Developer. Providing the best articles and solutions for different problems in the best manner through my blogs is my passion. I have more than six years of experience with various RDBMS products like MSSQL Server, PostgreSQL, MySQL, Greenplum and currently learning and doing research on BIGData and NoSQL technology. -- Hyderabad, India.

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