【转载】笔记_SQLite 语法

SQLite 语法

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;

参考:
https://www.runoob.com/sqlite/sqlite-syntax.html
    原文作者:sqlite
    原文地址: https://www.cnblogs.com/aeron99/p/11198634.html
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