How to change column datatype in SQL Server database without losing data?
I have SQL Server database and I just realized that I can change the type of one of the columns from int to … Read more
alter
How to move columns in a MySQL table?
Currently I am having the following MySQL table: Employees (empID, empName, department); I want to change the table to the following: Employees (empID, … Read more
How to remove constraints from my MySQL table?
I want to remove constraints from my table. My query is: ALTER TABLE `tbl_magazine_issue` DROP CONSTRAINT `FK_tbl_magazine_issue_mst_users` But I got an error: #1064 … Read more
How to DROP multiple columns with a single ALTER TABLE statement in SQL Server?
I would like to write a single SQL command to drop multiple columns from a single table in one ALTER TABLE statement. From … Read more
How do I modify a MySQL column to allow NULL?
MySQL 5.0.45 What is the syntax to alter a table to allow a column to be null, alternately what’s wrong with this: ALTER … Read more