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The ALTER TABLE statement changes table attributes (column definitions and constraints) in a table that was previously created. The syntax allows a list of alter clauses; however, only one table constraint or column constraint can be added, modified, or deleted in each ALTER TABLE statement.
- SyBooks Online
alter index alter table for Index Compression alter table...
- Identity_Insert Option
A table name must be specified to identify the column to...
- Alter User Statement
ALTER USER statement Description. Changes user settings....
- Create Table Statement
CREATE TABLE statement Description. Creates a new table in...
- Alter Service Statement
ALTER SERVICE service-name ... you might limit the users...
- SyBooks Online
6 Σεπ 2012 · It is possible to change the column name by: ALTER TABLE "tableName" ALTER "columnName" TO "NewColumnName";
ALTER TABLE statement. Modifies a table definition or disables dependent views. ALTER TABLE [owner.] table-name { alter-clause, ... alter-clause : ADD create-clause . | ALTER column-name column-alteration . | ALTER [ CONSTRAINT constraint-name ] CHECK ( condition ) . | DROP drop-object . | RENAME rename-object . | table-alteration.
alter table table_name drop partition partition_name [, partition_name]... Parameters table_name. is the name of the table to change. Specify the database name if the table is in another database, and specify the owner’s name if more than one table of that name exists in the database.
The ALTER TABLE statement changes the structure of an existing table. With one ALTER TABLE statement it is possible to perform multiple operations, adding/dropping columns and constraints and also altering column specifications. Multiple operations in an ALTER TABLE statement are separated with commas. 5. 4. 2. 1. Version Count Increments
Description: Firebird 2 adds the possibility to set/alter defaults on existing columns. If the column already had a default, the new default will replace it. Column-level defaults always override domain-level defaults. Syntax: ALTER TABLE tablename ALTER [COLUMN] colname SET DEFAULT <default><default> ::= literal-value | context-variable | NULL.
This is not possible. You have two options: 1. Create a new table with a different name. You can use your favorite administration tool to extract DDL statement for the old table and just replace the table name.
