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DDL (ALTER TABLE (<table_name> (ADD COLUMN (<colunm_name>…
DDL
ALTER TABLE
<table_name>
ADD COLUMN
<colunm_name> <datatype>
DROP COLUMN
<column_name>
RENAME COLUMN
<colunm_name> TO <new_colunm_name>
ALTER COLUMN
<colunm_name>
SET
{null | not null}
DROP
TYPE
<datatype>
CREATE TABLE
<table_name> (column_name <datatype> {null | not null} , ...)
DROP TABLE
[IF EXIST] <table_name>