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mysql函数字段
mysql函数字段
MySql
修改时间
字段
的
函数
定义和用法DATE_ADD()
函数
向日期添加指定的时间间隔。DATE_SUB()
函数
向日期减少指定的时间间隔。语法DATE_ADD(date,INTERVAL expr type)DATE_SUB(date,INTERVAL expr type)date 参数是合法的日期表达式。...参考[1]
MySql
修改时间
字段
MySQL
中concat
函数
合成两个
字段
MySQL
中concat
函数
使用方法:CONCAT(str1,str2,…)返回结果为连接参数产生的字符串。如有任何一个参数为NULL,则返回值为 NULL。注意:如果所有参数均为非二进制字符串,则结果为非二进制字符串。如果自变量中含有任一二进制字符串,则结果...
MySQL
中AES_ENCRYPT('密码','钥匙')
函数
可以对
字段
值做加密处理
MySQL
中AES_ENCRYPT('密码','钥匙')
函数
可以对
字段
值做加密处理 AES_DECRYPT(表的
字段
名字,'钥匙')
函数
解密处理 例,表结构:现在插入一条数据,对passwd密码
字段
加密。1 2 INSERT INTO credit_card(cid,NAME,email,passwd)VALUES(101,'...
Python全栈
MySQL
数据库
(表字
段
增、删、改、查、
函数
)
聚合
函数
avg(
字段
名):求该
字段
的平均值 sum(
字段
名):求和 max(
字段
名):最大值 min(
字段
名):最小值 count(
字段
名):统计该
字段
的个数 create database MOSHOU;use MOSHOU;create table hero(id int,name char(15),sex enum(...
1
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云数据库RDS MySQL版
MySQL 是全球最受欢迎的开源数据库,阿里云MySQL版 通过深度的内核优化和独享实例提供稳定极致的数据库性能,同时灵活的部署架构及产品形态,可满足不同场景下的数据库需求。
了解详情
管理控制台
在线咨询
最新活动
MySQL 1年仅19.9元
数据库专场优惠
快速入门
帮助文档
快速入门
最佳实践
SaaS上云数据库
数据库客户案例合集
产品推荐
云数据库PolarDB
云原生数据仓库MySQL
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云数据库RDS MySQL版
MySQL 是全球最受欢迎的开源数据库,阿里云MySQL版 通过深度的内核优化和独享实例提供稳定极致的数据库性能,同时灵活的部署架构及产品形态,可满足不同场景下的数据库需求。
了解详情
管理控制台
在线咨询
最新活动
MySQL 1年仅19.9元
数据库专场优惠
快速入门
帮助文档
快速入门
最佳实践
SaaS上云数据库
数据库客户案例合集
产品推荐
云数据库PolarDB
云原生数据仓库MySQL