SQLite 语法
SQLite 语法
SQLite之后是称为语法的一组独特的规则和准则。本章列出了所有基本的SQLite语法。
区分大小写
需要注意的一点是,SQLite不区分大小写,即子句GLOB和glob在SQLite语句中具有相同的含义。
注释
SQLite注释是额外的注释,可以添加到SQLite代码中以提高其可读性,并且可以出现在任何地方;可以出现空白,包括表达式内部和其他SQL语句的中间,但不能嵌套。
SQL注释以两个连续的“-”字符(ASCII 0x2d)开头,并扩展到下一个换行符(ASCII 0x0a)或直到输入结束,以先到者为准。
您还可以使用C样式的注释,该注释以“ / *”开头,并扩展到下一个“ * /”字符对并包括下一个“ * /”字符对,或者直到输入结束(以先到者为准)。C样式注释可以跨越多行。
sqlite> .help -- This is a single line comment
SQLite语句
所有SQLite语句均以SELECT,INSERT,UPDATE,DELETE,ALTER,DROP等任何关键字开头,所有语句均以分号(;)结尾。
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(重命名)
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 INDEX database_name.view_name;
SQLite DROP TRIGGER语句
DROP INDEX database_name.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;