tsql – Page 17 – IT Nursery

How to check if a column exists in a SQL Server table?

April 10, 2022 by IT Nursery

I need to add a specific column if it does not exist. I have something like the following, but it always returns false: IF EXISTS(SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ‘myTableName’ AND COLUMN_NAME = ‘myColumnName’) How can I check if a column exists in a table of the SQL Server database? 3 32

How do I UPDATE from a SELECT in SQL Server?

April 9, 2022 by IT Nursery

In SQL Server, it is possible to insert rows into a table with an INSERT.. SELECT statement: INSERT INTO Table (col1, col2, col3) SELECT col1, col2, col3 FROM other_table WHERE sql=”cool” Is it also possible to update a table with SELECT? I have a temporary table containing the values and would like to update another … Read more