SQLite之后是稱為語法的一組獨特的規(guī)則和準則。本章列出了所有基本的SQLite語法。
需要注意的一點是,SQLite不區(qū)分大小寫,即子句GLOB和glob在SQLite語句中具有相同的含義。
SQLite注釋是額外的注釋,可以添加到SQLite代碼中以提高其可讀性,并且可以出現(xiàn)在任何地方;可以出現(xiàn)空白,包括表達式內(nèi)部和其他SQL語句的中間,但不能嵌套。
SQL注釋以兩個連續(xù)的“-”字符(ASCII 0x2d)開頭,并擴展到下一個換行符(ASCII 0x0a)或直到輸入結(jié)束,以先到者為準。
您還可以使用C樣式的注釋,該注釋以“ / *”開頭,并擴展到下一個“ * /”字符對并包括下一個“ * /”字符對,或者直到輸入結(jié)束(以先到者為準)。C樣式注釋可以跨越多行。
sqlite> .help -- This is a single line comment
所有SQLite語句均以SELECT,INSERT,UPDATE,DELETE,ALTER,DROP等任何關(guān)鍵字開頭,所有語句均以分號(;)結(jié)尾。
ANALYZE; or ANALYZE database_name; or ANALYZE database_name.table_name;
SELECT column1, column2....columnN FROM table_name WHERE CONDITION-1 {AND|OR} CONDITION-2;
ALTER TABLE table_name ADD COLUMN column_def...;
ALTER TABLE table_name RENAME TO new_table_name;
ATTACH DATABASE 'DatabaseName' As 'Alias-Name';
BEGIN; or BEGIN EXCLUSIVE TRANSACTION;
SELECT column1, column2....columnN FROM table_name WHERE column_name BETWEEN val-1 AND val-2;
COMMIT;
CREATE INDEX index_name ON table_name ( column_name COLLATE NOCASE );
CREATE UNIQUE INDEX index_name ON table_name ( column1, column2,...columnN);
CREATE TABLE table_name( column1 datatype, column2 datatype, column3 datatype, ..... columnN datatype, PRIMARY KEY( one or more columns ));
CREATE TRIGGER database_name.trigger_name BEFORE INSERT ON table_name FOR EACH ROW BEGIN stmt1; stmt2; .... END;
CREATE VIEW database_name.view_name AS SELECT statement....;
CREATE VIRTUAL TABLE database_name.table_name USING weblog( access.log ); or CREATE VIRTUAL TABLE database_name.table_name USING fts3( );
COMMIT;
SELECT COUNT(column_name)FROM table_name WHERE CONDITION;
DELETE FROM table_name WHERE {CONDITION};
DETACH DATABASE 'Alias-Name';
SELECT DISTINCT column1, column2....columnN FROM table_name;
DROP INDEX database_name.index_name;
DROP TABLE database_name.table_name;
DROP INDEX database_name.view_name;
DROP INDEX database_name.trigger_name;
SELECT column1, column2....columnN FROM table_name WHERE column_name EXISTS (SELECT * FROM table_name );
EXPLAIN INSERT statement...; or EXPLAIN QUERY PLAN SELECT statement...;
SELECT column1, column2....columnN FROM table_name WHERE column_name GLOB { PATTERN };
SELECT SUM(column_name)FROM table_name WHERE CONDITION GROUP BY column_name;
SELECT SUM(column_name)FROM table_name WHERE CONDITION GROUP BY column_name HAVING (arithematic function condition);
INSERT INTO table_name( column1, column2....columnN) VALUES ( value1, value2....valueN);
SELECT column1, column2....columnN FROM table_name WHERE column_name IN (val-1, val-2,...val-N);
SELECT column1, column2....columnN FROM table_name WHERE column_name LIKE { PATTERN };
SELECT column1, column2....columnN FROM table_name WHERE column_name NOT IN (val-1, val-2,...val-N);
SELECT column1, column2....columnN FROM table_name WHERE CONDITION ORDER BY column_name {ASC|DESC};
PRAGMA pragma_name; For example: PRAGMA page_size; PRAGMA cache_size = 1024; PRAGMA table_info(table_name);
RELEASE savepoint_name;
REINDEX collation_name; REINDEX database_name.index_name; REINDEX database_name.table_name;
ROLLBACK; or ROLLBACK TO SAVEPOINT savepoint_name;
SAVEPOINT savepoint_name;
SELECT column1, column2....columnN FROM table_name;
UPDATE table_name SET column1 = value1, column2 = value2....columnN=valueN [ WHERE CONDITION ];
VACUUM;
SELECT column1, column2....columnN FROM table_name WHERE CONDITION;