語句語法

AND / OR	SELECT column_name(s) FROM table_name WHERE condition AND|OR condition
ALTER TABLE (add column)	ALTER TABLE table_name ADD column_name datatype
ALTER TABLE (drop column)	ALTER TABLE table_name DROP COLUMN column_name
AS (alias for column)	SELECT column_name AS column_alias FROM table_name
AS (alias for table)	SELECT column_name FROM table_name  AS table_alias
BETWEEN	SELECT column_name(s) FROM table_name WHERE column_name BETWEEN value1 AND value2
CREATE DATABASE	CREATE DATABASE database_name
CREATE INDEX	CREATE INDEX index_name ON table_name (column_name)
CREATE TABLE	CREATE TABLE table_name ( column_name1 data_type,

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