1 | +---+---+ 3 rows in set (0.07 sec) mysql> update v_student4 set department='test' ; 1288 - The target table v_student4 of the UPDATE is not updatable mysql> delete from v_student4; 1288 - The target table v_student4 of the DELETE is not updatable 注意:虽然可以更新...
SELECT DISTINCT A.name FROM club A INNER JOIN football B USING(name); SELECT DISTINCT name FROM club WHERE (name) IN (SELECT name FROM football); SELECT DISTINCT A.name FROM club A LEFT JOIN football B USING(name) WHERE B.name IS NOT NULL; 示例: 三、无交集值 显示第一个SQL语句的结果...
Kindly help... I urgently need to setup this database in MySQL. Thanks Sonia Subject Written By Posted Unable to JOIN view and a table in MySQL Sonia Agrawal February 24, 2010 09:59PM Sorry, you can't reply to this topic. It has been closed. ...
// 表结构CREATETABLE`user`(`id`intNOTNULLAUTO_INCREMENTCOMMENT'用户id',`name`varchar(32)COLLATEutf8_binDEFAULTNULLCOMMENT'姓名',`point`intDEFAULT'0'COMMENT'积分',PRIMARYKEY(`id`))ENGINE=InnoDBDEFAULTCHARSET=utf8COLLATE=utf8_bin//插入一条记录INSERTINTOuser(name,point)VALUES('xiaoxu',100) 读未...
| +---+---+ 3 rows in set (0.07 sec) mysql> update v_student4 set department='test' ; 1288 - The target table v_student4 of the UPDATE is not updatable mysql> delete from v_student4; 1288 - The target table v_student4 of the DELETE is not updatable 注意:虽然可以更新视图数据...
TheVIEW_TABLE_USAGEtable (available as of MySQL 8.0.13) provides access to information about tables and views used in view definitions. You can see information only for views for which you have some privilege, and only for tables for which you have some privilege. ...
The INNODB_SYS_TABLESTATS table provides a view of low-level status information about InnoDB tables. This data is used by the MySQL optimizer to calculate which index to use when querying an InnoDB table. This information is derived from in-memory data structures rather than data stored on dis...
mysql权限show view mysql show view权限 一、视图 视图:VIEW,虚表,保存有实表的查询结果,在视图插入的内容都会存入表中。 创建方法: CREATE VIEW view_name [(column_list)] AS select_statement [WITH [CASCADED | LOCAL] CHECK OPTION] 1. 2.
虽然PyQt5中提供的 QSqlQueryModel, QSqlRelationalTableModel, QSqlTableModel可以完成相应的操作,且不需用户自己写SQL语句,但总感觉功能有很大的局限性,比如,QSqlQueryModel是一个只读模型,而QSqlTableModel只能对单表进行操作等,灵活性很差,用起来不得心应手,因此决定开发一个自己的Model模块,将数据用QtableView进行...
1. I want to create a temporary table in the view and also stored procedure .This temporary table exist only when i run the view or stored procedure.When I try to do this in my view or stored procedured ,the temporary table is created directly in the database.Does MySql allow us to...