How do I drop a column in Sybase IQ?
The RazorSQL alter table tool includes a Drop Column option for dropping a column from a Sybase database table. The drop column function allows the user to select a column to drop from the table. The tool then generates the appropriate alter table drop column SQL command for dropping the column from the table.
What does drop column do?
The DROP COLUMN command is used to delete a column in an existing table.
How do I drop a column in a table?
SQL Drop Column Syntax
- ALTER TABLE “table_name” DROP “column_name”;
- ALTER TABLE “table_name” DROP COLUMN “column_name”;
- ALTER TABLE Customer DROP Birth_Date;
- ALTER TABLE Customer DROP COLUMN Birth_Date;
- ALTER TABLE Customer DROP COLUMN Birth_Date;
How do I add multiple columns in Sybase?
To add an additional column to the output, just add a column to the select: select 0 as col1, * into dbo.
Can I drop a column from a table SQL?
SQL allows a user to remove one or more columns from a given table in the database if they are no longer needed or become redundant. To do so, the user must have ALTER permission on the object. Let’s begin with the syntax for using the ALTER TABLE DROP COLUMN statement.
How do I delete SQL?
SQL DELETE Statement
- DELETE FROM table_name WHERE condition;
- Example. DELETE FROM Customers WHERE CustomerName=’Alfreds Futterkiste’;
- DELETE FROM table_name;
- Example. DELETE FROM Customers;
How do I drop a column?
Can we drop column in SQL?
SQL Server allows the user to delete one or more columns from the table whenever they are not used or obsolete. It is required to have ALTER permission on the object before removing the columns from a table.
How do I drop a column from a Sybase table?
The RazorSQL alter table tool includes a Drop Column option for dropping a column from a Sybase database table. The drop column function allows the user to select a column to drop from the table. The tool then generates the appropriate alter table drop column SQL command for dropping the column from the table.
What is the use of drop constraint in Sybase?
The drop constraint function allows the user to enter a constraint to drop from the table. The tool then generates the appropriate alter table drop constraint SQL command for dropping the constraint from the table. Listed below is an example of the SQL generated by the Sybase Alter Table Drop Constraint function:
What does select into mean in Sybase?
Interesting, the fact that “select into” has to be turned on means that the Sybase server is internally copying the data from the old table to a new copy of the table, without using the transaction logs (or using transaction logs only to log the allocation of pages, not the data change within the page). Ie. sort of like bulkcopy.
What does no datacopy parameter do in ALTER TABLE drop column?
The no datacopy parameter to the alter table drop column allows you to drop columns from a table without performing a data copy, and reduces the amount of time required for alter table drop column to run. Show activity on this post. Just want to share with you I’ve just had similar issue, and in my case I had to add “drop” before each column name.