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SQLite 语法 | 小熊教程

SQLite 语法

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SQLite 是遵循一套独特的称为语法的规则和准则。本教程列出了所有基本的 SQLite 语法,向您提供了一个 SQLite 快速入门。

大小写敏感性

有个重要的点值得注意,SQLite 是不区分大小写的,但也有一些命令是大小写敏感的,比如 GLOBglob 在 SQLite 的语句中有不同的含义。

注释

SQLite 注释是附加的注释,可以在 SQLite 代码中添加注释以增加其可读性,他们可以出现在任何空白处,包括在表达式内和其他 SQL 语句的中间,但它们不能嵌套。

SQL 注释以两个连续的 “-” 字符(ASCII 0x2d)开始,并扩展至下一个换行符(ASCII 0x0a)或直到输入结束,以先到者为准。

您也可以使用 C 风格的注释,以 “/*” 开始,并扩展至下一个 “*/” 字符对或直到输入结束,以先到者为准。SQLite的注释可以跨越多行。

 sqlite>.help -- 这是一个简单的注释 

SQLite 语句

所有的 SQLite 语句可以以任何关键字开始,如 SELECT、INSERT、UPDATE、DELETE、ALTER、DROP 等,所有的语句以分号(;)结束。

SQLite ANALYZE 语句:

 ANALYZE; or ANALYZE database_name; or ANALYZE database_name.table_name; 

SQLite AND/OR 子句:

 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(Rename):

 ALTER TABLE table_name RENAME TO new_table_name; 

SQLite ATTACH DATABASE 语句:

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

SQLite BEGIN TRANSACTION 语句:

 BEGIN; or BEGIN EXCLUSIVE TRANSACTION; 

SQLite BETWEEN 子句:

 SELECT column1, column2....columnN FROM   table_name WHERE  column_name BETWEEN val-1 AND val-2; 

SQLite COMMIT 语句:

 COMMIT; 

SQLite CREATE INDEX 语句:

 CREATE INDEX index_name ON table_name ( column_name COLLATE NOCASE ); 

SQLite CREATE UNIQUE INDEX 语句:

 CREATE UNIQUE INDEX index_name ON table_name ( column1, column2,...columnN); 

SQLite CREATE TABLE 语句:

 CREATE TABLE table_name(    column1 datatype,    column2 datatype,    column3 datatype,    .....    columnN datatype,    PRIMARY KEY( one or more columns ) ); 

SQLite CREATE TRIGGER 语句:

 CREATE TRIGGER database_name.trigger_name  BEFORE INSERT ON table_name FOR EACH ROW BEGIN     stmt1;     stmt2;    .... END; 

SQLite CREATE VIEW 语句:

 CREATE VIEW database_name.view_name  AS SELECT statement....; 

SQLite CREATE VIRTUAL TABLE 语句:

 CREATE VIRTUAL TABLE database_name.table_name USING weblog( access.log ); or CREATE VIRTUAL TABLE database_name.table_name USING fts3( ); 

SQLite COMMIT TRANSACTION 语句:

 COMMIT; 

SQLite COUNT 子句:

 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 子句:

 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 VIEW view_name; 

SQLite DROP TRIGGER 语句:

 DROP TRIGGER trigger_name 

SQLite EXISTS 子句:

 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 子句:

 SELECT column1, column2....columnN FROM   table_name WHERE  column_name GLOB { PATTERN }; 

SQLite GROUP BY 子句:

 SELECT SUM(column_name) FROM   table_name WHERE  CONDITION GROUP BY column_name; 

SQLite HAVING 子句:

 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 子句:

 SELECT column1, column2....columnN FROM   table_name WHERE  column_name IN (val-1, val-2,...val-N); 

SQLite Like 子句:

 SELECT column1, column2....columnN FROM   table_name WHERE  column_name LIKE { PATTERN }; 

SQLite NOT IN 子句:

 SELECT column1, column2....columnN FROM   table_name WHERE  column_name NOT IN (val-1, val-2,...val-N); 

SQLite ORDER BY 子句:

 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 子句:

 SELECT column1, column2....columnN FROM   table_name WHERE  CONDITION; 
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