mysql-fron快速写sql语句,SQL 快速参考

雨点打透心脏的1/2处 2023-01-14 04:54 101阅读 0赞

SQL 语句 语法

AND / OR SELECT column\_name(s)

FROM table\_name

WHERE condition

AND|OR condition

ALTER TABLE ALTER TABLE table\_name

ADD column\_name datatype

ALTER TABLE table\_name

DROP COLUMN column\_name

AS (alias) SELECT column\_name AS column\_alias

FROM table\_name

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 TABLE CREATE TABLE table\_name

(

column\_name1 data\_type,

column\_name2 data\_type,

...

)

CREATE INDEX CREATE INDEX index\_name

ON table\_name (column\_name)

CREATE UNIQUE INDEX index\_name

ON table\_name (column\_name)

CREATE VIEW CREATE VIEW view\_name AS

SELECT column\_name(s)

FROM table\_name

WHERE condition

DELETE DELETE FROM table\_name

WHERE some\_column=some\_value

DELETE FROM table\_name

(Note:Deletes the entire table!!)

DELETE \* FROM table\_name

(Note:Deletes the entire table!!)

DROP DATABASE DROP DATABASE database\_name

DROP INDEX DROP INDEX table\_name.index\_name (SQL Server)

DROP INDEX index\_name ON table\_name (MS Access)

DROP INDEX index\_name (DB2/Oracle)

ALTER TABLE table\_name

DROP INDEX index\_name (MySQL)

DROP TABLE DROP TABLE table\_name

GROUP BY SELECT column\_name, aggregate\_function(column\_name)

FROM table\_name

WHERE column\_name operator value

GROUP BY column\_name

HAVING SELECT column\_name, aggregate\_function(column\_name)

FROM table\_name

WHERE column\_name operator value

GROUP BY column\_name

HAVING aggregate\_function(column\_name) operator value

IN SELECT column\_name(s)

FROM table\_name

WHERE column\_name

IN (value1,value2,..)

INSERT INTO INSERT INTO table\_name

VALUES (value1, value2, value3,....)

INSERT INTO table\_name

(column1, column2, column3,...)

VALUES (value1, value2, value3,....)

INNER JOIN SELECT column\_name(s)

FROM table\_name1

INNER JOIN table\_name2

ON table\_name1.column\_name=table\_name2.column\_name

LEFT JOIN SELECT column\_name(s)

FROM table\_name1

LEFT JOIN table\_name2

ON table\_name1.column\_name=table\_name2.column\_name

RIGHT JOIN SELECT column\_name(s)

FROM table\_name1

RIGHT JOIN table\_name2

ON table\_name1.column\_name=table\_name2.column\_name

FULL JOIN SELECT column\_name(s)

FROM table\_name1

FULL JOIN table\_name2

ON table\_name1.column\_name=table\_name2.column\_name

LIKE SELECT column\_name(s)

FROM table\_name

WHERE column\_name LIKE pattern

ORDER BY SELECT column\_name(s)

FROM table\_name

ORDER BY column\_name \[ASC|DESC\]

SELECT SELECT column\_name(s)

FROM table\_name

SELECT \* SELECT \*

FROM table\_name

SELECT DISTINCT SELECT DISTINCT column\_name(s)

FROM table\_name

SELECT INTO SELECT \*

INTO new\_table\_name \[IN externaldatabase\]

FROM old\_table\_name

SELECT column\_name(s)

INTO new\_table\_name \[IN externaldatabase\]

FROM old\_table\_name

SELECT TOP SELECT TOP number|percent column\_name(s)

FROM table\_name

TRUNCATE TABLE TRUNCATE TABLE table\_name

UNION SELECT column\_name(s) FROM table\_name1

UNION

SELECT column\_name(s) FROM table\_name2

UNION ALL SELECT column\_name(s) FROM table\_name1

UNION ALL

SELECT column\_name(s) FROM table\_name2

UPDATE UPDATE table\_name

SET column1=value, column2=value,...

WHERE some\_column=some\_value

WHERE SELECT column\_name(s)

FROM table\_name

WHERE column\_name operator value

mysql-fron快速写sql语句,SQL 快速参考

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