SQL provides the ALTER TABLE statement to change the structure of a table. If you’d like to remove a column from a table, use this statement. First, write ALTER TABLE, followed by the name of the table you want to change (in our example, product). Next add the DROP COLUMN clause,...
InPostgreSQL, the“ALTER TABLE”and“ALTER COLUMN”commands, along with theTYPEKeyword, are used to change/modify the data type of a column. For example, integer to character, text to varchar, and so on. InPostgreSQL, we can change the data type of one or more than one column using the...
How to: For MySQL set column value based on another column. For this, we have two options: IF function and CASE statement.
As an example, say you wanted to create a table to record some information about your favorite parks in New York City. After deciding what attributes you’d like to record about each park, you would then decide on column names for each of those attributes as well as the appropriate data ...
database. Now you realize that some or all of the columns in your database needed to have the COLLATION set to be case sensitive. This tip will take you through the steps required to change the column COLLATION of your tables from SQL_Latin1_General_CP1_CI_AS to SQL_Latin1_General_...
When you change collation of database, it will be new default for all new tables and columns, but it doesn't change the collation of existing objects inside database. You have to go and change manually the collation of every table and column. ...
replicated article. For simple cases this is quite straightforward - adding a column is achieved usingsp_repladdcolumn, whilesp_repldropcolumnis used to drop a column. However, what if we want tochangean existing column- e.g. change the Fname varchar(50) column below to Fname varchar(100...
Excel as the front-end for managing the data in SQL Server. You can use it to connect to SQL Server and load tables into Excel to view and edit data before saving the changes back to the database. Other features include look-up columns, data validation, change tracking and pivot tables...
How to: To SQL add a column with a default value is a simple operation in SQL. Let us set up a ‘student’ table as below:
To change a column filter to include additional columns for an article published in a snapshot or transactional publication At the Publisher on the publication database, execute sp_articlecolumn once for each column being added. Specify the column name for @column and a value of add for @opera...