创建表 (CREATE TABLE):

CREATE TABLE table_name ( column1 data_type constraint,column2 data_type constraint,... );

插入数据 (INSERT INTO):

INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...);

查询数据 (SELECT):

SELECT column1, column2, ... FROM table_name WHERE condition;

更新数据 (UPDATE):

UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;

删除数据 (DELETE):

DELETE FROM table_name WHERE condition;

修改表结构 (ALTER TABLE):

添加列: 

ALTER TABLE table_name ADD COLUMN column_name data_type;

删除列: 

ALTER TABLE table_name DROP COLUMN column_name;

修改列的数据类型: 

ALTER TABLE table_name ALTER COLUMN column_name TYPE new_data_type;

重命名列: 

ALTER TABLE table_name RENAME COLUMN old_column_name TO new_column_name;

重命名表 (RENAME):

ALTER TABLE old_table_name RENAME TO new_table_name;

删除表 (DROP TABLE):

DROP TABLE table_name;

创建索引 (CREATE INDEX):

CREATE INDEX index_name ON table_name (column_name);

删除索引 (DROP INDEX):

DROP INDEX index_name;

创建视图 (CREATE VIEW):

CREATE VIEW view_name AS SELECT column1, column2, ... FROM table_name WHERE condition;

删除视图 (DROP VIEW):

DROP VIEW view_name;

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