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SQL语法

2016-06-12 14:54 323 查看

SQL 语句

SQL语法
语句语法
AND / ORSELECT 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
BETWEENSELECT column_name(s)

FROM table_name

WHERE column_name

BETWEEN value1 AND value2
CREATE DATABASECREATE DATABASE database_name
CREATE INDEXCREATE INDEX index_name

ON table_name (column_name)
CREATE TABLECREATE TABLE table_name

(

column_name1 data_type,

column_name2 data_type,

.......

)
CREATE UNIQUE INDEXCREATE UNIQUE INDEX index_name

ON table_name (column_name)
CREATE VIEWCREATE VIEW view_name AS

SELECT column_name(s)

FROM table_name

WHERE condition
DELETE FROMDELETE FROM table_name

(Note: Deletes the entire table!!)
or

DELETE FROM table_name

WHERE condition

DROP DATABASEDROP DATABASE database_name
DROP INDEXDROP INDEX table_name.index_name
DROP TABLEDROP TABLE table_name
GROUP BYSELECT column_name1,SUM(column_name2)

FROM table_name

GROUP BY column_name1
HAVINGSELECT column_name1,SUM(column_name2)

FROM table_name

GROUP BY column_name1

HAVING SUM(column_name2) condition value
INSELECT column_name(s)

FROM table_name

WHERE column_name

IN (value1,value2,..)
INSERT INTOINSERT INTO table_name

VALUES (value1, value2,....)
or

INSERT INTO table_name

(column_name1, column_name2,...)

VALUES (value1, value2,....)

LIKESELECT column_name(s)

FROM table_name

WHERE column_name

LIKE pattern
ORDER BYSELECT column_name(s)

FROM table_name

ORDER BY column_name [ASC|DESC]
SELECTSELECT column_name(s)

FROM table_name
SELECT *SELECT *

FROM table_name
SELECT DISTINCTSELECT DISTINCT column_name(s)

FROM table_name
SELECT INTO

(used to create backup copies of tables)		SELECT *

INTO new_table_name

FROM original_table_name
or

SELECT column_name(s)

INTO new_table_name

FROM original_table_name

TRUNCATE TABLE

(deletes only the data inside the table)		TRUNCATE TABLE table_name
UPDATEUPDATE table_name

SET column_name=new_value

[, column_name=new_value]

WHERE column_name=some_value
WHERESELECT column_name(s)

FROM table_name

WHERE condition
  
  
 
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标签：  SQL SQL Server select SQL语句
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