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;