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查看“SQLite 语法”的源代码
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{{DISPLAYTITLE:SQLite 语法}}[[Category:SQLite 教程|5]] = 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。 <pre class="prettyprint"> sqlite>.help -- 这是一个简单的注释 </pre> == 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: == <pre class="prettyprint"> ANALYZE; or ANALYZE database_name; or ANALYZE database_name.table_name; </pre> == SQLite AND/OR 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE CONDITION-1 {AND|OR} CONDITION-2; </pre> == SQLite ALTER TABLE 语句: == <pre class="prettyprint"> ALTER TABLE table_name ADD COLUMN column_def...; </pre> == SQLite ALTER TABLE 语句(Rename): == <pre class="prettyprint"> ALTER TABLE table_name RENAME TO new_table_name; </pre> == SQLite ATTACH DATABASE 语句: == <pre class="prettyprint"> ATTACH DATABASE 'DatabaseName' As 'Alias-Name'; </pre> == SQLite BEGIN TRANSACTION 语句: == <pre class="prettyprint"> BEGIN; or BEGIN EXCLUSIVE TRANSACTION; </pre> == SQLite BETWEEN 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE column_name BETWEEN val-1 AND val-2; </pre> == SQLite COMMIT 语句: == <pre class="prettyprint"> COMMIT; </pre> == SQLite CREATE INDEX 语句: == <pre class="prettyprint"> CREATE INDEX index_name ON table_name ( column_name COLLATE NOCASE ); </pre> == SQLite CREATE UNIQUE INDEX 语句: == <pre class="prettyprint"> CREATE UNIQUE INDEX index_name ON table_name ( column1, column2,...columnN); </pre> == SQLite CREATE TABLE 语句: == <pre class="prettyprint"> CREATE TABLE table_name( column1 datatype, column2 datatype, column3 datatype, ..... columnN datatype, PRIMARY KEY( one or more columns ) ); </pre> == SQLite CREATE TRIGGER 语句: == <pre class="prettyprint"> CREATE TRIGGER database_name.trigger_name BEFORE INSERT ON table_name FOR EACH ROW BEGIN stmt1; stmt2; .... END; </pre> == SQLite CREATE VIEW 语句: == <pre class="prettyprint"> CREATE VIEW database_name.view_name AS SELECT statement....; </pre> == SQLite CREATE VIRTUAL TABLE 语句: == <pre class="prettyprint"> CREATE VIRTUAL TABLE database_name.table_name USING weblog( access.log ); or CREATE VIRTUAL TABLE database_name.table_name USING fts3( ); </pre> == SQLite COMMIT TRANSACTION 语句: == <pre class="prettyprint"> COMMIT; </pre> == SQLite COUNT 子句: == <pre class="prettyprint"> SELECT COUNT(column_name) FROM table_name WHERE CONDITION; </pre> == SQLite DELETE 语句: == <pre class="prettyprint"> DELETE FROM table_name WHERE {CONDITION}; </pre> == SQLite DETACH DATABASE 语句: == <pre class="prettyprint"> DETACH DATABASE 'Alias-Name'; </pre> == SQLite DISTINCT 子句: == <pre class="prettyprint"> SELECT DISTINCT column1, column2....columnN FROM table_name; </pre> == SQLite DROP INDEX 语句: == <pre class="prettyprint"> DROP INDEX database_name.index_name; </pre> == SQLite DROP TABLE 语句: == <pre class="prettyprint"> DROP TABLE database_name.table_name; </pre> == SQLite DROP VIEW 语句: == <pre> DROP VIEW view_name; </pre> == SQLite DROP TRIGGER 语句: == <pre> DROP TRIGGER trigger_name </pre> == SQLite EXISTS 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE column_name EXISTS (SELECT * FROM table_name ); </pre> == SQLite EXPLAIN 语句: == <pre class="prettyprint"> EXPLAIN INSERT statement...; or EXPLAIN QUERY PLAN SELECT statement...; </pre> == SQLite GLOB 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE column_name GLOB { PATTERN }; </pre> == SQLite GROUP BY 子句: == <pre class="prettyprint"> SELECT SUM(column_name) FROM table_name WHERE CONDITION GROUP BY column_name; </pre> == SQLite HAVING 子句: == <pre class="prettyprint"> SELECT SUM(column_name) FROM table_name WHERE CONDITION GROUP BY column_name HAVING (arithematic function condition); </pre> == SQLite INSERT INTO 语句: == <pre class="prettyprint"> INSERT INTO table_name( column1, column2....columnN) VALUES ( value1, value2....valueN); </pre> == SQLite IN 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE column_name IN (val-1, val-2,...val-N); </pre> == SQLite Like 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE column_name LIKE { PATTERN }; </pre> == SQLite NOT IN 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE column_name NOT IN (val-1, val-2,...val-N); </pre> == SQLite ORDER BY 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE CONDITION ORDER BY column_name {ASC|DESC}; </pre> == SQLite PRAGMA 语句: == <pre class="prettyprint"> PRAGMA pragma_name; For example: PRAGMA page_size; PRAGMA cache_size = 1024; PRAGMA table_info(table_name); </pre> == SQLite RELEASE SAVEPOINT 语句: == <pre class="prettyprint"> RELEASE savepoint_name; </pre> == SQLite REINDEX 语句: == <pre class="prettyprint"> REINDEX collation_name; REINDEX database_name.index_name; REINDEX database_name.table_name; </pre> == SQLite ROLLBACK 语句: == <pre class="prettyprint"> ROLLBACK; or ROLLBACK TO SAVEPOINT savepoint_name; </pre> == SQLite SAVEPOINT 语句: == <pre class="prettyprint"> SAVEPOINT savepoint_name; </pre> == SQLite SELECT 语句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name; </pre> == SQLite UPDATE 语句: == <pre class="prettyprint"> UPDATE table_name SET column1 = value1, column2 = value2....columnN=valueN [ WHERE CONDITION ]; </pre> == SQLite VACUUM 语句: == <pre class="prettyprint"> VACUUM; </pre> == SQLite WHERE 子句: == <pre class="prettyprint"> SELECT column1, column2....columnN FROM table_name WHERE CONDITION; </pre>
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