Auto-Increment Columns : If you delete the row containing the maximum value for an AUTO_INCREMENT column, the value is not reused for a MyISAM or InnoDB table. Example: MySQL DELETE specific rows or records The following statement will remove those records from the 'newcate' table which sati...
. 省略部分 ### 说明概述若通过tcp/ip地址连接mysql;它将先检查权限视图表,检测请求方的ip是否允许被连接 mysql> use mysql; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select host, user...
存储过程是由一组 SQL 语句构成的数据库对象,存储过程可以被存储在数据库中并在需要时执行。它支持控制流结构(如IF语句、CASE语句、循环等),能够封装和重用数据库操作,提升代码的模块化和可维护性。 4.1 IF 判断 IF语句是MySQL存储过程中的一种常见控制流结构,用于根据特定条件执行不同的 SQL 语句。它可以单独使...
def delete_table_data(database_name, table_name, delete_condition, is_run, is_need_confirm): global DELETE_DATABASE_NAME global DELETE_TABLE_NAME global DELETE_TABLE_KEY global DELETE_CONDITION global VIEW_OR_RUN DELETE_DATABASE_NAME = database_name DELETE_TABLE_NAME = table_name DELETE_CON...
buf_remove=buf_remove@entry=BUF_REMOVE_FLUSH_NO_WRITE) at mysql-5.7.22/storage/innobase/fil/fil0fil.cc:2800 #14 0x0000000000fe77bd in row_drop_single_table_tablespace (trx=0x0, is_encrypted=false, is_temp=false, filepath=0x7f9d7c209f38 "./sbtest/sbtest25.ibd", tablename=0x7f9...
1 row in set (0.01 sec) 1. 2. 3. 4. 5. 6. 7. 接下来把这一个分区去掉就好了,注意要用remove,别用drop,用drop会将分区及数据一起删掉 MySQL> alter table history_uint REMOVE PARTITIONING; Query OK, 0 rows affected (3 min 52.38 sec) ...
--- 3.2 修改表的行格式ALTERTABLEt1ROW_FORMAT=COMPRESSED;--- 3.3 重置表的自增数ALTERTABLEt1A...
drop table t1; View Code 操作文件内容(记录) 在表里边操作增insert t1(id,name) values(1,'egon1'),(2,'egon2'),(3,'egon3');查select id,name from db1.t1;select * from db1.t1;(不推荐使用,测试的时候可以用)改update db1.t1 set name='SB';update db1.t1 set name='ALEX' where ...
base: atguigudb Create Database: CREATE DATABASE `atguigudb` /*!40100 DEFAULT CHARACTER SET latin1 */ 1 row in set (0.00 sec) 上面的结果显示atguigudb数据也不中文,字符集默认是latin1。 10、删除表格 drop table 表名称;#删除学生表 droptable student; 11、删除数据库 drop database ...
Getting the id of an inserted row If you are inserting a row into a table with an auto increment primary key, you can retrieve the insert id like this: connection.query('INSERT INTO posts SET ?', {title: 'test'}, function (error, results, fields) { if (error) throw error; console...