SQL basics- complete reference guide - part2 - DDL

Part2: DDL -Data Definition Language Reference

Command	Description	SYNTAX	Example
ALTER INDEX RENAME	Renames an index.	ALTER INDEX indexName RENAME TO newIndexName
ALTER SCHEMA RENAME	Renames a schema.	ALTER SCHEMA schema RENAME TO newSchemaName
ALTER SEQUENCE	Changes the next value and the increment of a sequence.	ALTER SEQUENCE sequenceName [ RESTART WITH long ] [ INCREMENT BY long ]
ALTER TABLE ADD	Adds a new column to a table.	ALTER TABLE tableName ADD name dataType [ DEFAULT expression ] [ [ NOT ] NULL ] [ AUTO_INCREMENT | IDENTITY ] [ BEFORE columnName ]
ALTER TABLE ADD CONSTRAINT	Adds a constraint to a table.	ALTER TABLE tableName ADD constraint [ CHECK | NOCHECK ]
ALTER TABLE ALTER	Changes the data type of a column, rename a column, change the identity value, or change the selectivity.	ALTER TABLE tableName ALTER COLUMN columnName { { dataType [ DEFAULT expression ] [ [ NOT ] NULL ] [ AUTO_INCREMENT | IDENTITY ] }     | { RENAME TO name }     | { RESTART WITH long }     | { SELECTIVITY int }     | { SET DEFAULT expression }     | { SET NULL }     | { SET NOT NULL } }
ALTER TABLE DROP COLUMN	Removes a column from a table.	ALTER TABLE tableName DROP COLUMN columnName
ALTER TABLE DROP CONSTRAINT	Removes a constraint or a primary key from a table.	ALTER TABLE tableName DROP { CONSTRAINT [ IF EXISTS ] constraintName | PRIMARY KEY }
ALTER TABLE SET	Disables or enables referential integrity checking for a table.	ALTER TABLE tableName SET REFERENTIAL_INTEGRITY     { FALSE | TRUE [ CHECK | NOCHECK ] }
ALTER TABLE RENAME	Renames a table.	ALTER TABLE tableName RENAME TO newName
ALTER USER ADMIN	Switches the admin flag of a user on or off.	ALTER USER userName ADMIN { TRUE | FALSE }
ALTER USER RENAME	Renames a user.	ALTER USER userName RENAME TO newUserName
ALTER USER SET PASSWORD	Changes the password of a user.	ALTER USER userName SET { PASSWORD string | SALT bytes HASH bytes }
ALTER VIEW	Recompiles a view after the underlying tables have been changed or created.	ALTER VIEW viewName RECOMPILE
ANALYZE	Updates the selectivity statistics of all tables.	ANALYZE [ SAMPLE_SIZE rowCountInt ]
COMMENT	Sets the comment of a database object.	COMMENT ON { { COLUMN [ schemaName. ] tableName.columnName }     | { { TABLE | VIEW | CONSTANT | CONSTRAINT | ALIAS | INDEX | ROLE     | SCHEMA | SEQUENCE | TRIGGER | USER | DOMAIN } [ schemaName. ] objectName } } IS expression
CREATE AGGREGATE	Creates a new user-defined aggregate function.	CREATE AGGREGATE [ IF NOT EXISTS ] newAggregateName FOR className
CREATE ALIAS	Creates a new function alias.	CREATE ALIAS [ IF NOT EXISTS ] newFunctionAliasName [ DETERMINISTIC ] { FOR classAndMethodName | AS sourceCodeString }
CREATE CONSTANT	Creates a new constant.	CREATE CONSTANT [ IF NOT EXISTS ] newConstantName VALUE expression
CREATE DOMAIN	Creates a new data type (domain).	CREATE DOMAIN [ IF NOT EXISTS ] newDomainName AS dataType [ DEFAULT expression ] [ [ NOT ] NULL ] [ SELECTIVITY selectivity ] [ CHECK condition ]
CREATE INDEX	Creates a new index.	CREATE { [ UNIQUE ] [ HASH ] INDEX [ IF NOT EXISTS ] newIndexName     | PRIMARY KEY [ HASH ] } ON tableName ( indexColumn [,...] )
CREATE LINKED TABLE	Creates a table link to an external table.	CREATE [ [ GLOBAL | LOCAL ] TEMPORARY ] LINKED TABLE [ IF NOT EXISTS ] name ( driverString, urlString, userString, passwordString, [ originalSchemaString, ] originalTableString ) [ EMIT UPDATES | READONLY ]
CREATE ROLE	Creates a new role.	CREATE ROLE [ IF NOT EXISTS ] newRoleName
CREATE SCHEMA	Creates a new schema.	CREATE SCHEMA [ IF NOT EXISTS ] name [ AUTHORIZATION ownerUserName ]
CREATE SEQUENCE	Creates a new sequence.	CREATE SEQUENCE [ IF NOT EXISTS ] newSequenceName [ START WITH long ] [ INCREMENT BY long ] [ CACHE long ]
CREATE TABLE	Creates a new table.	CREATE [ CACHED | MEMORY ] [ TEMP | [ GLOBAL | LOCAL ] TEMPORARY ] TABLE [ IF NOT EXISTS ] name { { ( { columnDefinition | constraint } [,...] ) [ AS select ] }     | { AS select } } [ ENGINE tableEngineName ] [ TRANSACTIONAL ] [ NOT PERSISTENT ]
CREATE TRIGGER	Creates a new trigger.	CREATE TRIGGER [ IF NOT EXISTS ] newTriggerName { BEFORE | AFTER | INSTEAD OF } { INSERT | UPDATE | DELETE | SELECT | ROLLBACK } [,...] ON tableName [ FOR EACH ROW ] [ QUEUE int ] [ NOWAIT ] CALL triggeredClassName
CREATE USER	Creates a new user.	CREATE USER [ IF NOT EXISTS ] newUserName { PASSWORD string | SALT bytes HASH bytes } [ ADMIN ]
CREATE VIEW	Creates a new view.	CREATE [ OR REPLACE ] [ FORCE ] VIEW [ IF NOT EXISTS ] newViewName [ ( columnName [,...] ) ] AS select
DROP AGGREGATE	Drops an existing user-defined aggregate function.	DROP AGGREGATE [ IF EXISTS ] aggregateName
DROP ALIAS	Drops an existing function alias.	DROP ALIAS [ IF EXISTS ] existingFunctionAliasName
DROP ALL OBJECTS	Drops all existing views, tables, sequences, schemas, function aliases, roles, user-defined aggregate functions, domains, and users (except the current user).	DROP ALL OBJECTS [ DELETE FILES ]
DROP CONSTANT	Drops a constant.	DROP CONSTANT [ IF EXISTS ] constantName
DROP DOMAIN	Drops a data type (domain).	DROP DOMAIN [ IF EXISTS ] domainName
DROP INDEX	Drops an index.	DROP INDEX [ IF EXISTS ] indexName
DROP ROLE	Drops a role.	DROP ROLE [ IF EXISTS ] roleName
DROP SCHEMA	Drops a schema.	DROP SCHEMA [ IF EXISTS ] schemaName
DROP SEQUENCE	Drops a sequence.	DROP SEQUENCE [ IF EXISTS ] sequenceName
DROP TABLE	Drops an existing table, or a list of tables.	DROP TABLE [ IF EXISTS ] tableName [,...] [ CASCADE | RESTRICT ]
DROP TRIGGER	Drops an existing trigger.	DROP TRIGGER [ IF EXISTS ] triggerName
DROP USER	Drops a user.	DROP USER [ IF EXISTS ] userName
DROP VIEW	Drops an existing view.	DROP VIEW [ IF EXISTS ] viewName [ RESTRICT | CASCADE ]
TRUNCATE TABLE	Removes all rows from a table.	TRUNCATE TABLE tableName