SQLite3 语法

作者:fly 发布于:2017-2-24 10:02 分类:SQLite3

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 GLOB 和 glob 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 -- This is a single line comment


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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