Jun 21, 2016 · ALTER TABLE [dbo.table_name] ADD [Column_Name] BIT NOT NULL Default ( 0 ) Here is another way to add a column to an existing database table with a default value. A much more …

SQL-script: How to write ALTER statements to set Primary key on an existing table? Asked 13 years, 5 months ago Modified 1 year, 8 months ago Viewed 1.1m times

Apr 13, 2012 · How to change the column size of the salary column in the employee table from numeric(18,0) to numeric(22,5)

Mar 6, 2016 · SQLite The ALTER TABLE command is a bit special. There is no possibility to modify a column. You have to create a new column, migrate the data, and then drop the column: -- 1. First …

Jan 24, 2015 · I need to ALTER the data types of several columns in a table. For a single column, the following works fine: ALTER TABLE tblcommodityOHLC ALTER COLUMN …

Jul 8, 2016 · Alter table add multiple columns ms sql Asked 15 years, 10 months ago Modified 1 year ago Viewed 512k times

Aug 24, 2017 · ALTER TABLE Post ALTER COLUMN Body nvarchar(8000) NOT NULL; The column is defined as nvarchar (4000) and it gives me this error: Msg 2717, Level 16, State 2, Line 1 The size …

I have a foreign key constraint in my table, I want to add ON DELETE CASCADE to it. I have tried this: alter table child_table_name modify constraint fk_name foreign key (child_column_name)

Mar 27, 2009 · ALTER TABLE tablename MODIFY columnname datatype NOT NULL; Otherwise abatichev's answer seemed good. You can't repeat the alter - it complains (at least in SQL …

Jun 14, 2011 · 409 I would like to write a single SQL command to drop multiple columns from a single table in one ALTER TABLE statement. From MSDN's ALTER TABLE documentation...