cheat.sheets/sheets/_db2/ddl

--Create a schema
CREATE SCHEMA sch1

--Create a table specifying primary key
CREATE TABLE tbl1 (col1 CHAR(1) NOT NULL PRIMARY KEY)
CREATE TABLE tbl2 (col1 INT NOT NULL, col2 DATE NOT NULL, PRIMARY KEY (col1, col2))

--Create a table specifying tablespaces
CREATE TABLE tbl3 (col1 INT NOT NULL, col2 CHAR(1)) IN ts1 INDEX IN ts2

--Create a table specifying schema
CREATE TABLE sch1.tbl4 (col1 INT)

--Create a table with auto incremental column
CREATE TABLE tbl5 (col1 INT NOT NULL GENERATED AS IDENTITY)

--Create a table like another one
CREATE TABLE tbl6 LIKE tbl1 IN ts1 INDEX IN ts2

--Comment on table and column
COMMENT ON TABLE tbl1 IS 'Comment in table'
COMMENT ON COLUMN tbl1.col1 IS 'Description of the field'

--Declare a temporary table (session schema)
DECLARE GLOBAL TEMPORARY TABLE tmp1 (col1 INT, col2 DATE) ON COMMIT PRESERVE ROWS

--Create a global temporary tablespace
CREATE GLOBAL TEMPORARY TABLE tmp2 (col1 INT)

--Create an index
CREATE INDEX idx1 ON tbl2 (col2)

--Create a unique index
CREATE UNIQUE INDEX idx2 ON tbl5 (col1)

--Drop an index
DROP INDEX idx1

--Add a column (requires Reorg table)
ALTER TABLE tbl1 ADD COLUMN col3 timestamp

--Change nullability
ALTER TABLE tbl1 ALTER COLUMN col3 SET NOT NULL

--Drop nullability
ALTER TABLE tbl1 ALTER COLUMN col3 DROP NOT NULL

--Rename a column
ALTER TABLE tbl1 RENAME COLUMN col3 TO new3

--Drop column
ALTER TABLE tbl1 DROP COLUMN new3

--Create a primary key constraint
ALTER TABLE tbl5 ADD CONSTRAINT pkt5 PRIMARY KEY (col1)

--Drop primary key
ALTER TABLE tbl5 DROP PRIMARY KEY

--Add identity
ALTER TABLE tbl2 ALTER col1 SET GENERATED ALWAYS AS IDENTITY

--Restart identity
ALTER TABLE tbl2 ALTER col1 RESTART WITH 1

--Drop identity
ALTER TABLE tbl2 ALTER col1 DROP IDENTITY

--Create a foreign key
ALTER TABLE tbl5 ADD CONSTRAINT fkt5 FOREIGN KEY (col1) REFERENCES tbl11 (col1)

--Create a check constraint
ALTER TABLE tbl1 ADD CONSTRAINT chk CHECK (col1 in ('a', 'b', 'c'))

--Enforce a constraint
ALTER TABLE tbl1 ALTER CHECK chk ENFORCED

--Not enforce a constraint
ALTER TABLE tbl5 ALTER FOREIGN KEY fkt5 NOT ENFORCED

--Change the granularity of the locks
ALTER TABLE tbl1 LOCKSIZE TABLE

--Drop a table
DROP TABLE tbl1

--Rename a table
RENAME TABLE tbl2 TO table2

--Truncate a table
TRUNCATE TABLE tbl1 IMMEDIATE

--Create a sequence
CREATE SEQUENCE seq AS INTEGER

--Restart sequence
ALTER SEQUENCE seq RESTART WITH 15

--Create a stored procedure
CREATE OR REPLACE PROCEDURE prc1 (IN val INT, OUT ret DATE) SPECIFIC mypr BEGIN SET ret = (SELECT col2 FROM tbl2 WHERE col1 = val); END @

--Create a trigger
CREATE TRIGGER cp_val AFTER INSERT ON tbl1 REFERENCING NEW AS n FOR EACH ROW INSERT INTO tbl2 VALUES (n.col1, n.col2)

--Create a view
CREATE VIEW vw1 AS SELECT col2 FROM tbl1