标签：
1. 查询某个表中所有非空字段名
SELECT `COLUMN_NAME` FROM `information_schema`.`COLUMNS` WHERE `IS_NULLABLE` = ‘No‘ AND `TABLE_NAME` = ‘feed‘ AND `TABLE_SCHEMA` = ‘prodb_mgmt‘
2. 查看一个表的所有字段
describe <表名>
3. 查看表大小 http://stackoverflow.com/questions/9620198/how-to-get-the-sizes-of-the-tables-of-a-mysql-database
SELECT
table_name AS `Table`,
round(((data_length + index_length) / 1024 / 1024), 2) `Size in MB`
FROM information_schema.TABLES
WHERE table_schema = "$DB_NAME"
AND table_name = "$TABLE_NAME";
4. 显示表的建表语句 http://dev.mysql.com/doc/refman/5.7/en/show-create-table.html
mysql> show create table serverStatusInfo \G; *************************** 1. row *************************** Table: serverStatusInfo Create Table: CREATE TABLE `serverStatusInfo` ( `date` date NOT NULL, `server` varchar(45) NOT NULL, `requestsActiveMax` int(10) unsigned default ‘0‘, `requestTimeMax` int(10) unsigned default ‘0‘, `requestTimeMean` float default ‘0‘, `requestTimeStdDev` float default ‘0‘, PRIMARY KEY (`date`,`server`) ) ENGINE=InnoDB DEFAULT CHARSET=gbk 1 row in set (0.00 sec)
delete from tableName; Delete: will delete all rows from your table. Next insert will take next auto increment id. truncate tableName; Truncate: will also delete the rows from your table but it will start from new row with 1.
标签：
原文地址：http://www.cnblogs.com/joshuajiang/p/5166654.html
