SQLite -语法

SQLite -语法

SQLite是紧随其后的是独特的组称为语法的规则和指导方针。本教程为您提供了快速启动和SQLite的清单的所有基本SQLite语法。

大小写敏感性

注意重要的一点是,SQLite是大小写不敏感,但也有一些命令,这是区分大小写的GLOB和glob在SQLite报表有不同的意义

注解

SQLite评论是额外的笔记,你可以添加在你的SQLite代码来增加其可读性和他们可以出现在任何地方,空白可以发生,包括在中间的表情和其他SQL语句,但他们不能嵌套。　　　　

SQL注释开始连续两个"-"字符(ASCII 0 x2d)和扩展包括下一个换行符(ASCII 0 x0a)或在年底前输入,哪个是第一位的。　　　　

您还可以使用c风格的评论,首先"/ *"和扩展包括下一个"* /"字符对或在年底前输入,哪个是第一位的。c风格的评论可以跨越多个行。　　

sqlite >。帮助——这是一行评论

sqlite>.help --
This
is a single line comment

SQLite语句

所有SQLite语句开始等任何关键词的选择、插入、更新、删除、涂改、下降,等等,所有的语句以分号(;)结束。

SQLite分析声明:

ANALYZE;

or

ANALYZE database_name;

or

ANALYZE database_name.table_name;

SQLite和/或条款:

SELECT column1, column2....columnN

FROM table_name

WHERE CONDITION-1
{AND|OR} CONDITION-2;

SQLite ALTER TABLE语句:

ALTER TABLE table_name ADD COLUMN column_def...;

SQLite ALTER TABLE语句(重命名):

ALTER TABLE table_name RENAME TO new_table_name;

SQLite数据库附加声明:

ATTACH DATABASE 'DatabaseName'
As
'Alias-Name';

SQLite开始事务声明:

BEGIN;

or

BEGIN EXCLUSIVE TRANSACTION;

SQLite之间的条款:

SELECT column1, column2....columnN

FROM table_name

WHERE column_name BETWEEN val-1 AND val-2;

SQLite COMMIT语句:

COMMIT;

SQLite创建索引语句

CREATE INDEX index_name

ON table_name ( column_name COLLATE NOCASE );

SQLite创建TABLE语句:

CREATE TABLE table_name(

column1 datatype,

column2 datatype,

column3 datatype,

.....

columnN datatype,

PRIMARY KEY( one or more columns )

);

SQLite创建触发器语句:

CREATE TRIGGER database_name.trigger_name

BEFORE INSERT ON table_name FOR EACH ROW

BEGIN
					

   stmt1;
					

   stmt2;
					

					....
					

END;

SQLite创建视图语句:

 

CREATE VIEW database_name.view_name  AS

SELECT statement....;

SQLite创建虚拟表声明:

CREATE VIRTUAL TABLE database_name.table_name USING weblog( access.log );
					

or
					

CREATE VIRTUAL TABLE database_name.table_name USING fts3(
					);

SQLite提交事务声明:

COMMIT;

 

SQLite数条款:

SELECT COUNT(column_name)
					

FROM   table_name

WHERE  CONDITION;

SQLite DELETE语句:

DELETE FROM table_name

WHERE  {CONDITION};

SQLite DETACH DATABASE语句:

DETACH DATABASE 'Alias-Name';

SQLite DISTINCT语句:

SELECT DISTINCT column1, column2....columnN

FROM   table_name;

SQLite DROP INDEX语句:

DROP INDEX database_name.index_name;

SQLite DROP TABLE 语句:

DROP TABLE database_name.table_name;

SQLite DROP VIEW 语句 :

DROP INDEX database_name.view_name;

SQLite DROP TRIGGER 语句 :

DROP INDEX database_name.trigger_name;

SQLite EXISTS Clause:

SELECT column1, column2....columnN

FROM   table_name

WHERE  column_name EXISTS (SELECT * FROM   table_name );

SQLite EXPLAIN 语句 :

EXPLAIN INSERT statement...;
					

or
					

EXPLAIN QUERY PLAN SELECT statement...;

SQLite GLOB Clause:

SELECT column1, column2....columnN

FROM   table_name

WHERE  column_name GLOB { PATTERN };

SQLite GROUP BY Clause:

SELECT SUM(column_name)
					

FROM   table_name

WHERE  CONDITION

GROUP BY column_name;

SQLite HAVING Clause:

SELECT SUM(column_name)
					

FROM   table_name

WHERE  CONDITION

GROUP BY column_name

HAVING (arithematic function condition);

SQLite INSERT INTO 语句

INSERT INTO table_name( column1, column2....columnN)
					

VALUES ( value1, value2....valueN);

SQLite IN Clause:

SELECT column1, column2....columnN

FROM   table_name

WHERE  column_name IN (val-1, val-2,...val-N);

SQLite Like Clause:

SELECT column1, column2....columnN

FROM   table_name

WHERE  column_name LIKE { PATTERN };

SQLite NOT IN Clause:

SELECT column1, column2....columnN

FROM   table_name

WHERE  column_name NOT IN (val-1, val-2,...val-N);

SQLite ORDER BY Clause:

SELECT column1, column2....columnN

FROM   table_name

WHERE  CONDITION

ORDER BY column_name {ASC|DESC};

SQLite PRAGMA 语句

PRAGMA pragma_name;
					

 

For example:
					

 

PRAGMA page_size;
					

PRAGMA cache_size =
					1024;
					

PRAGMA table_info(table_name);

SQLite RELEASE SAVEPOINT 语句:

RELEASE savepoint_name;

SQLite REINDEX 语句:

REINDEX collation_name;
					

REINDEX database_name.index_name;
					

REINDEX database_name.table_name;

SQLite ROLLBACK 语句:

ROLLBACK;
					

or
					

ROLLBACK TO SAVEPOINT savepoint_name;

SQLite SAVEPOINT语句:

SAVEPOINT savepoint_name;

SQLite SELECT 语句:

SELECT column1, column2....columnN

FROM   table_name;

SQLite UPDATE 语句:

UPDATE table_name

SET column1 = value1, column2 = value2....columnN=valueN

[ WHERE  CONDITION ];

SQLite VACUUM 语句:

VACUUM;

SQLite WHERE Clause:

SELECT column1, column2....columnN

FROM   table_name

WHERE  CONDITION;