SQLITE学习之SQLITE基础知识(二)

2023年2月9日 110次阅读 来源: 蜀中豪杰

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。
常见SQLITE语句
1)SQLite ANALYZE 语句

ANALYZE;
or
ANALYZE database_name;
or
ANALYZE database_name.table_name;

2）SQLite AND/OR 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  CONDITION-1 {AND|OR} CONDITION-2;

3）SQLite ALTER(更改) TABLE 语句

ALTER TABLE table_name ADD COLUMN column_def...;

4）SQLite ALTER TABLE 语句（Rename）(为表重新命名)

ALTER TABLE table_name RENAME TO new_table_name;

5）SQLite ATTACH DATABASE 语句(附加数据库)

ATTACH DATABASE 'DatabaseName' As 'Alias-Name';

6）SQLite BEGIN TRANSACTION 语句(开始事务)

BEGIN;
or
BEGIN EXCLUSIVE TRANSACTION;

7）SQLite BETWEEN 语句

SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name BETWEEN val-1 AND val-2;

8）SQLite COMMIT /SQLite COMMIT TRANSACTION 语句(保存更改)

COMMIT;

9）SQLite CREATE INDEX 语句(创建索引)

CREATE INDEX index_name
ON table_name ( column_name COLLATE NOCASE );

10）SQLite CREATE UNIQUE INDEX 语句（创建独一无二的索引）

CREATE UNIQUE INDEX index_name
ON table_name ( column1, column2,...columnN);

11）SQLite CREATE TABLE 语句(创建表)

CREATE TABLE table_name(
   column1 datatype,
   column2 datatype,
   column3 datatype,
   .....
   columnN datatype,
   PRIMARY KEY( one or more columns )
);

12)SQLite CREATE TRIGGER 语句（创建触发器）

CREATE TRIGGER database_name.trigger_name 
BEFORE INSERT ON table_name FOR EACH ROW
BEGIN 
   stmt1; 
   stmt2;
   ....
END;

13）SQLite CREATE VIEW 语句(创建视图)

CREATE VIEW database_name.view_name  AS
SELECT statement....;

14）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( );

15）SQLite WHERE 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  CONDITION;

16）SQLite COUNT 子句

SELECT COUNT(column_name)
FROM   table_name
WHERE  CONDITION;

17）SQLite DELETE 语句

DELETE FROM table_name
WHERE  {CONDITION};

18）SQLite DETACH DATABASE 语句（分离数据库）

DETACH DATABASE 'Alias-Name';

19）SQLite DISTINCT 子句

SELECT DISTINCT column1, column2....columnN
FROM   table_name;

20）SQLite DROP INDEX 语句(删除索引)

DROP INDEX database_name.index_name;

21）SQLite DROP TABLE 语句(删除表格)

DROP TABLE database_name.table_name;

22）SQLite DROP VIEW 语句（删除视图）

DROP VIEW view_name;

23）SQLite DROP TRIGGER 语句(删除触发器)

DROP TRIGGER trigger_name

24）SQLite EXISTS 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name EXISTS (SELECT * FROM   table_name );

25）SQLite EXPLAIN 语句

EXPLAIN INSERT statement...;
or 
EXPLAIN QUERY PLAN SELECT statement...;

26）SQLite GLOB 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name GLOB { PATTERN };

27）SQLite GROUP BY 子句

SELECT SUM(column_name)
FROM   table_name
WHERE  CONDITION
GROUP BY column_name;

28）SQLite HAVING 子句

SELECT SUM(column_name)
FROM   table_name
WHERE  CONDITION
GROUP BY column_name
HAVING (arithematic function condition);

29)SQLite INSERT INTO 语句（插入数据操作）

INSERT INTO table_name( column1, column2....columnN)
VALUES ( value1, value2....valueN);

30）SQLite IN 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name IN (val-1, val-2,...val-N);

31）SQLite Like 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name LIKE { PATTERN };

32）SQLite NOT IN 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  column_name NOT IN (val-1, val-2,...val-N);

33）SQLite ORDER BY 子句

SELECT column1, column2....columnN
FROM   table_name
WHERE  CONDITION
ORDER BY column_name {ASC|DESC};

34）SQLite PRAGMA 语句

PRAGMA pragma_name;
For example:	
PRAGMA page_size;
PRAGMA cache_size = 1024;
PRAGMA table_info(table_name);

35）SQLite RELEASE SAVEPOINT 语句

RELEASE savepoint_name;

36）SQLite REINDEX 语句

REINDEX collation_name;
REINDEX database_name.index_name;
REINDEX database_name.table_name;

37）SQLite ROLLBACK 语句(回滚)

ROLLBACK;
or
ROLLBACK TO SAVEPOINT savepoint_name;

38）SQLite SAVEPOINT 语句

SAVEPOINT savepoint_name;

39）SQLite SELECT 语句（查询数据)

SELECT column1, column2....columnN
FROM   table_name;

40）SQLite UPDATE 语句(更新数据)

UPDATE table_name
SET column1 = value1, column2 = value2....columnN=valueN
[ WHERE  CONDITION ]；

Note:

  • 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。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。
    原文作者：蜀中豪杰
    原文地址: https://blog.csdn.net/cainiaoxiakexing/article/details/91872976
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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