SQLite语法

sqlite 语法

大小写敏感性

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 GLOB 和 glob 在 sqlite 的语句中有不同的含义。

sql 注释以两个连续的 "-" 字符（ASCII 0x2d）开始，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；

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-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;