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 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 -- 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;orANALYZE database_name;orANALYZE database_name.table_name;SQLite AND/OR 子句：SELECT column1, column2....columnNFROM table_nameWHERE 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;orBEGIN EXCLUSIVE TRANSACTION;SQLite BETWEEN 子句：SELECT column1, column2....columnNFROM table_nameWHERE column_name BETWEEN val-1 AND val-2;SQLite COMMIT 语句：COMMIT;SQLite CREATE INDEX 语句：CREATE INDEX index_nameON table_name ( column_name COLLATE NOCASE );SQLite CREATE UNIQUE INDEX 语句：CREATE UNIQUE INDEX index_nameON 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 ROWBEGIN stmt1; stmt2; ....END;SQLite CREATE VIEW 语句：CREATE VIEW database_name.view_name ASSELECT statement....;SQLite CREATE VIRTUAL TABLE 语句：CREATE VIRTUAL TABLE database_name.table_name USING weblog( access.log );orCREATE VIRTUAL TABLE database_name.table_name USING fts3( );SQLite COMMIT TRANSACTION 语句：COMMIT;SQLite COUNT 子句：SELECT COUNT(column_name)FROM table_nameWHERE CONDITION;SQLite DELETE 语句：DELETE FROM table_nameWHERE {CONDITION};SQLite DETACH DATABASE 语句：DETACH DATABASE 'Alias-Name';SQLite DISTINCT 子句：SELECT DISTINCT column1, column2....columnNFROM 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_nameSQLite EXISTS 子句：SELECT column1, column2....columnNFROM table_nameWHERE 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....columnNFROM table_nameWHERE column_name GLOB { PATTERN };SQLite GROUP BY 子句：SELECT SUM(column_name)FROM table_nameWHERE CONDITIONGROUP BY column_name;SQLite HAVING 子句：SELECT SUM(column_name)FROM table_nameWHERE CONDITIONGROUP BY column_nameHAVING (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....columnNFROM table_nameWHERE column_name IN (val-1, val-2,...val-N);SQLite Like 子句：SELECT column1, column2....columnNFROM table_nameWHERE column_name LIKE { PATTERN };SQLite NOT IN 子句：SELECT column1, column2....columnNFROM table_nameWHERE column_name NOT IN (val-1, val-2,...val-N);SQLite ORDER BY 子句：SELECT column1, column2....columnNFROM table_nameWHERE CONDITIONORDER 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;orROLLBACK TO SAVEPOINT savepoint_name;SQLite SAVEPOINT 语句：SAVEPOINT savepoint_name;SQLite SELECT 语句：SELECT column1, column2....columnNFROM table_name;SQLite UPDATE 语句：UPDATE table_nameSET column1 = value1, column2 = value2....columnN=valueN[ WHERE CONDITION ];SQLite VACUUM 语句：VACUUM;SQLite WHERE 子句：SELECT column1, column2....columnNFROM table_nameWHERE CONDITION;