importmysql.connectordefmysql_str_to_list():# 建立与 MySQL 数据库的连接cnx=mysql.connector.connect(user='your_username',password='your_password',host='localhost',database='your_database')# 创建游标对象cursor=cnx.cursor()# 执行 SQL 查询语句query="SELECT column_name FROM table_name"cursor.exec...
MySQL Cluster enables users to meet the database challenges of next generation web, cloud, and communications services with uncompromising scalability, uptime and agility. Learn More » Free Webinars Unlocking the Power of JavaScript in MySQL: Creating Stored Programs with Ease ...
REPLACE(str,from_str,to_str) 返回字符串str,其字符串from_str的所有出现由字符串to_str代替。 mysql> select REPLACE('www.mysql.com', 'w', 'Ww'); -> '' 该函数对多字节是可靠的。 REPEAT(str,count) 返回由重复countTimes次的字符串str组成的一个字符串。如果count <= 0,返回一个空字符串。如...
2. 查看表就是下面这三条sql语句,分号;和\G都可以作为sql语句的结束,只不过显示的方式不同,前者是以行为分隔符进行显示,后者是以二维形式的表结构来进行显示。 3. 修改表名:alter table old_table_name rename to new_table_name,to可以省略,直接rename 向表中新增一列:alter table table_name add 列名 列...
4.通过存储过程添加LIST分区 (1)添加分区的存储过程 DROPPROCEDUREIFEXISTScreate_list_partition ; DELIMITER $$CREATEPROCEDUREIFNOTEXISTScreate_list_partition (par_valuebigint, tb_schemavarchar(128),tb_namevarchar(128))BEGINDECLAREpar_namevarchar(32);DECLAREpar_value_strvarchar(32);DECLAREpar_existint(...
UPDATE performance_schema.setup_instruments SET ENABLED= 'NO' WHERE NAME = 'memory/sql/my_str_malloc'; UPDATE performance_schema.setup_instruments SET ENABLED= 'NO' WHERE NAME = 'memory/sql/MYSQL_BIN_LOG::basename'; UPDATE performance_schema.setup_instruments SET ENABLED= 'NO' WHERE NAME = ...
ord(str) 如果字符串str句首是单字节返回与ascii()函数返回的相同值。 如果是一个多字节字符,以格式返回((first byte ascii code)*256+(second byte ascii code))[*256+third byte asciicode...] mysql> select ord('2'); -> 50 conv(n,from_base,to_base) ...
--socketUnix socket file or Windows named pipe to use --source-keyringSource keyring component name --source-keyring-configuration-dirSource keyring component configuration directory --ssl-caFile that contains list of trusted SSL Certificate Authorities ...
columns分区支持一个或者多个字段作为分区键，不支持表达式作为分区键，这点区别于range 和 list 分区。需要注意的是range columns 分区键的比较是基于元组的比较，也就是基于字段组的比较，这和range分区有差异。create talbe rc3 (a int,b int)partition by range columns(a, b) (partition p01 values less than...
--init-command=str Command-Line Format --init-command=str SQL statement to execute after connecting to the server. If auto-reconnect is enabled, the statement is executed again after reconnection occurs. --line-numbers Command-Line Format --line-numbers Disabled by skip-line-numbers Write ...