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。
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。
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