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Mysql, sqlserver Oracle database connection mode
2022-07-07 19:42:00 【Aimin20210819】
Programming connection mode
sql server The default port number is :1433
URL:"jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=dbname"
DRIVERNAME:"com.microsoft.jdbc.sqlserver.SQLServerDriver";
mysql The default port number is :3306
URL:jdbc:mysql://localhost:3306/test? user=root&password=&useUnicode=true&characterEncoding=gbk
DRIVERNAME:"com.mysql.jdbc.Driver";
oracle The default port number is :1521
URL:"jdbc:oracle:thin:@localhost :1521:orcl";
DRIVERNAME:"oracle.jdbc.driver.OracleDriver";
DOS yes Disk Operation System For short , Meaning for Disk operating system
Create a table and add comments
CREATE TABLE `t_account_phone_pool` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`create_time` datetime DEFAULT NULL COMMENT ' Creation time ',
`update_time` datetime DEFAULT NULL COMMENT ' Modification time ',
`is_enable` tinyint(1) NOT NULL DEFAULT '1' COMMENT ' Data available 0: Unavailable ;1: You can use ',
`is_delete` tinyint(1) NOT NULL DEFAULT '0' COMMENT ' Logical deletion 0: Not delete ;1: Delete ',
`create_user` varchar(20) DEFAULT NULL COMMENT ' founder ',
`update_user` varchar(20) DEFAULT NULL COMMENT ' Modifier ',
`account_name` varchar(20) NOT NULL COMMENT ' Account name ',
`phone` varchar(20) NOT NULL COMMENT ' number ',
`send_limit_count` int(11) NOT NULL COMMENT ' Send limit times ',
PRIMARY KEY (`id`),
KEY `idx_phone_account_name` (`phone`,`account_name`),
KEY `idx_phone` (`phone`),
KEY `idx_account_name` (`account_name`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8 COMMENT=' Account number - Number pool table ';
Command to view field comments in the table ( explain )
show full columns from tablename;
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