SELECT*FROM table_b WHERE table_b.user_name=table_a.user_name ) UPDATE insqlite3does not support a FROM clause, which makes this a little more work than in other RDBMS. If performance is not satisfactory, another option might be to build up new rows for table_a using a select and jo...
创建新表复制原有表的结构和数据 create table new_table as select * from old_table; 复制一张表...
But you cannot execute DROP TABLE, UPDATE, INSERT or DELETE against the sqlite_master table. The sqlite_master table is updated automatically as you create or drop tables and indices from the database. You can not make manual changes to the sqlite_master table. The schema for TEMPORARY tables...
Also update schema when clicking the Refresh button in Browse Data tab (16c3d8d) Select column in table results when column header is pressed (#2343) Tweak the output wording for command line options (#1069) Remove the default property of the cancel button in the "Fetching data..." dialog...
If you need to extract only a single column (SELECT %column_name% FROM %table_name% WHERE %conditions%) you can use a non-CRUD select function:// SELECT id FROM users auto allIds = storage.select(&User::id); cout << "allIds count = " << allIds.size() << endl; // allIds ...
5.3 改(UPDATE)语法:UPDATE table-name SET colA=valueA, colB=valueB, … [WHERE condition] 只对WHERE匹配到的条目进行修改. 如果不指定WHERE子句, 则会修改所有的记录sqlite> select * from company; id name age address salary --- --- --- --- --- 1 Paul 32 California 20000.0 2 Allen 25 ...
SELECTcolumn1,column2,... FROManother_table WHEREcondition; 示例示例 假设我们有两个表,old_employees和new_employees,我们想将old_employees表中的 数据复制到new_employees表中,但只复制那些salary大于5000的记录。 --创建表 CREATETABLEold_employees( ...
} sql = "UPDATE COMPANY set SALARY = 25000.00 where ID=2; " \ "SELECT * from COMPANY"; if ((ret = sqlite3_exec(db,sql,callback,(void*)test,&zErrMsg)) != SQLITE_OK ){ printf("Sql error is =%s \n",zErrMsg); return 0; }else{ printf("Table create successfully\n"); } sql...
* fixed crashes in sqlite3_table_column_metadata() use * added transaction patches from Jean-Louis Charton Sat Sep 20 2014 version 0.999 released * update to SQLite 3.8.6 * fixes to improve support of MS Excel 2010 * treat CTE expressions (WITH ...) like SELECT with ...
DROP TABLE DROP TRIGGER DROP VIEW END TRANSACTION EXPLAIN expression INSERT ON CONFLICT clause PRAGMA REPLACE ROLLBACK TRANSACTION SELECT UPDATE 同时它还支持事务处理功能等等。也有人说它象Microsoft的Access,有时候真的觉得有点象,但是事实上它们区别很大。比如SQLite 支持跨平台,操作简单,能够使用很多语言直接创...