SQLite3常用语句

http://www.360doc.com/content/15/0130/20/20918780_445078098.shtml

1.创建表
CREATE TABLE IF NOT EXISTS UserTable (username TEXT primary key,password TEXT,email TEXT);

2.插入一条数据
INSERT OR REPLACE INTO UserTable (username , password,email) VALUES (?,?,?);

3.更新一条数据
UPDATE UserTable set password = '123456'  where username = 'wxhl';

4.查询数据
SELECT username,password,email FROM UserTable where username = 'wxhl'

5.删除数据
DELETE FROM UserTable WHERE username='wxhl'

6.模糊查询
SELECT *FROM UserTable Where username is LIKE "流%"

7.倒叙排列(默认正)
SELECT *FROM UserTable ORDER BY sage DESC

//使用数据库的流程
/*
 *  1、打开数据库
 *  2、准备语句
 *  3、读取(绑定)列
 *  4、语句完结
 *  5、关闭数据库 
 */

//sqlite3.0 API
1.导入 libsqlite3.0.dylib
2. sqlite3_open()   //打开数据库
3. sqlite3_close()  //关闭数据库
4. sqlite3_exec()   //执行sql语句,例如创建表
5. sqlite3_prepare_v2()  //编译SQL语句
6. sqlite3_step()   //执行SQL语句
7. sqlite3_finalize()  //结束sql语句
8. sqlite3_bind_text()  //往数据库占位符上填充数据
9. sqlite3_column_text() //查询字段上的数据
9. SQLITE_OK 执行结果成功、  SQLITE_ERROR 执行失败

实例:
1. sqlite3_open([sandboxPath UTF8String], &dbPointer);
2. sqlite3_close(dbPointer);
3. sqlite3_exec (database, [sql  UTF8String],NULL, NULL, &errorMsg)
4. sqlite3_prepare_v2(contactDB, "SELECT *FROM contact1", -1, &stmt, NULL);
5. while (sqlite3_step(statement) == SQLITE_ROW) {
6. sqlite3_finalize(statement);
7. sqlite3_bind_text(stmt, 1, [address.name UTF8String], -1, NULL);
 




                                

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