Sqlite教程

SQLite 语法

语法是一组独特的规则和准则。以下是SQLite的语法列表。
区分大小写:
SQLite不区分大小写。但是,有些命令区分大小写。 例如: GLOB和glob在SQLite语句中具有不同的含义。
注释:
注释用于在SQLite代码中增加可读性。 注释不能嵌套。 注释以两个连续的"-"字符开头。 有时它还会显示为"/*",并延伸到并包括下一个" */"字符对。
SQLite语句
所有SQLite语句均以SELECT,INSERT,UPDATE,DELETE,ALTER,DROP等任何关键字开头。该语句将以分号(;)结尾。
SQLite ANALYZE语句
语法:
ANALYZE;
or
ANALYZE database_name;
or
ANALYZE database_name.table_name; 
SQLite AND/OR子句
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  CONDITION-1 {AND|OR} CONDITION-2; 
SQLite ALTER TABLE语句
语法:
ALTER TABLE table_name ADD COLUMN column_def...; 
SQLite ALTER TABLE语句(重命名)
语法:
ALTER TABLE table_name RENAME TO new_table_name; 
SQLite ATTACH DATABASE语句
语法:
ATTACH DATABASE 'DatabaseName' As 'Alias-Name';
SQLite BEGIN TRANSACTION语句
语法:
BEGIN;
or
BEGIN EXCLUSIVE TRANSACTION;
SQLite在子句之间
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name BETWEEN val-1 AND val-2;
SQLite COMMIT Statement:
COMMIT;
SQLite CREATE INDEX语句
语法:
CREATE INDEX index_name
ON table_name ( column_name COLLATE NOcase ); 
SQLite CREATE UNIQUE INDEX语句
语法:
CREATE UNIQUE INDEX index_name
ON table_name ( column1, column2,...columnN); 
SQLite CREATE TABLE语句
语法:
CREATE TABLE table_name(
   column1 datatype,
   column2 datatype,
   column3 datatype,
   .....
   columnN datatype,
   PRIMARY KEY( one or more columns )); 
SQLite CREATE TRIGGER语句
语法:
CREATE TRIGGER database_name.trigger_name 
BEFORE INSERT ON table_name for EACH ROW
BEGIN 
   stmt1; 
   stmt2;
   ....
END; 
SQLite CREATE VIEW语句
语法:
CREATE VIEW database_name.view_name  AS
SELECT statement....; 
SQLite CREATE VIRTUAL TABLE语句
语法:
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
语法:
COMMIT; 
SQLite COUNT子句
语法:
 SELECT COUNT(column_name)
FROM   table_name
WHERE  CONDITION;  
SQLite DELETE语句
语法:
DELETE FROM table_name
WHERE  {CONDITION}; 
SQLite DETACH DATABASE语句
语法:
DETACH DATABASE 'Alias-Name';
SQLite DISTINCT子句
语法:
SELECT DISTINCT column1, column2....columnN
FROM   table_name;
SQLite DROP INDEX语句
语法:
DROP INDEX database_name.index_name;
SQLite DROP TABLE语句
语法:
DROP TABLE database_name.table_name; 
SQLite DROP VIEW语句
语法:
DROP INDEX database_name.view_name;
SQLite DROP TRIGGER语句
语法:
DROP INDEX database_name.trigger_name;
SQLite EXISTS子句
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name EXISTS (SELECT * FROM   table_name );
SQLite EXPLAIN语句
语法:
EXPLAIN INSERT statement...;
or 
EXPLAIN QUERY PLAN SELECT statement...;
SQLite GLOB子句
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name GLOB { PATTERN };
SQLite GROUP BY子句
语法:
SELECT SUM(column_name)
FROM   table_name
WHERE  CONDITION
GROUP BY column_name;
SQLite HAVING子句
语法:
SELECT SUM(column_name)
FROM   table_name
WHERE  CONDITION
GROUP BY column_name
HAVING (arithematic function condition);
SQLite INSERT INTO语句
语法:
INSERT INTO table_name( column1, column2....columnN)
VALUES ( value1, value2....valueN);
SQLite IN子句
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name IN (val-1, val-2,...val-N);
SQLite Like子句
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name LIKE { PATTERN };
SQLite NOT IN子句
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name NOT IN (val-1, val-2,...val-N);
SQLite ORDER BY子句
语法:
SELECT column1, column2....columnN
FROM   table_name
WHERE  CONDITION
ORDER BY column_name {ASC|DESC};
SQLite PRAGMA语句
语法:
PRAGMA pragma_name;
例如:
PRAGMA page_size;
PRAGMA cache_size = 1024;
PRAGMA table_info(table_name);
SQLite RELEASE SAVEPOINT语句
语法:
RELEASE savepoint_name;
SQLite REINDEX语句
语法:
REINDEX collation_name;
REINDEX database_name.index_name;
REINDEX database_name.table_name;
SQLite ROLLBACK语句
语法:
ROLLBACK;
or
ROLLBACK TO SAVEPOint savepoint_name;
SQLite SAVEPOINT语句
语法:
SAVEPOint savepoint_name;
SQLite SELECT语句
语法:
SELECT column1, column2....columnN
FROM   table_name;
SQLite UPDATE语句
语法:
UPDATE table_name
SET column1 = value1, column2 = value2....columnN=valueN
[ WHERE  CONDITION ];
SQLite VACUUM语句
语法:
VACUUM;
SQLite WHERE Clause:
SELECT column1, column2....columnN
FROM   table_name
WHERE  CONDITION;

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