时间差函数TIMESTAMPDIFF、DATEDIFF的用法 我们在写sql语句,尤其是存储过程中,会频繁用到对于日期、时间的比较和判断,那么对于这两个时间差比较函数用法做一个举例介绍。 datediff函数,返回值是相差的天数,不能定位到小时、分钟和秒。 — 相差2天 select datediff(‘2018-03-22 09:00:00’, ‘2018-03-20 07:0...
技术标签:mysql 使用工具: navicat 15.0.18 mysql 5.7 使用目的: 当我们进行项目的迭代开发时,代码的版本控制、数据库的更新都是比较关键的问题。为了保证更新的功能所涉及的sql全部都能在上生产时一次执行,比较土的方法是开发改一条记录一条,但是迭代功能比较多或者多人合作开发时这种方法出差率就会很高了。所以很多...
MySQL Workbenchis the official GUI for MySQL development from Oracle. It includes schema comparison and synchronization utilities. It enables you to compare and synchronize schema between models, databases and SQL files. These three types can be the destination, source, or both. The following figure...
mysqldiff -1 dbuser:dbpassword@dbhost~database -2 dbuser:dbpassword@dbhost~database:dbport+sshuser:sshpassword@sshhost#sshport #data mysqldiff --db1=dbuser:dbpassword@dbhost~database --db2=dbuser:dbpassword@dbhost~database --diff=data --table=db1tablename:db2tablename mysqldiff -1 dbus...
for the DB connection details, if it’s not there the tool would return an error. If it’s there, the connection details would be used to compare the SQL of only the schema and output a commented migration.sql file inside the current directory which includes only the up SQL as per ...
Category:MySQL UtilitiesSeverity:S2 (Serious) Version:1.6.5OS:Any Assigned to:CPU Architecture:Any Tags:mysqldiff,SQL [29 Nov 2017 21:43] mark gruenberg Description:mysqldiff is not reporting the correct ddl to synchronize differences with indexesHow to repeat:mysql> create table t1 (c1 varchar...
Description: how about diff between .sql files e.g. mysqldiff --server1=user:pass@host:port:socket --server2=**.sql mysqldiff --server1=**.sql --server2=user:pass@host:port:socket mysqldiff --server1=**.sql --server2=**.sql Some time, we may need a offline diff How to repea...
MYSQL_DB_Diff 经常碰到在开发环境中修改数据库结构之后要记录后手动到生产环境中全部执行一遍,相当麻烦,而且可能出现漏掉修改的情况!没有找到合适的工具,于是作此程序,对比两个数据库的表、字段及索引差异,转换为对应的SQL语句,执行到生产环境中去。 【支持的操作】 ...
$result = mysql_query($sql); $err = $err.mysql_error(); I found an interesting post to a questions similar to mine which basically said that you have to take datetime, convert them to timestamps, subtract and then convert it in back into a datetime. Here's what the forum posting ...
MySQL と標準 SQL との違い SELECT INTO TABLE の違い UPDATE の違い FOREIGN KEY 制約の違い コメントの先頭としての「--」 MySQL における制約の処理 クレジット MySQL のインストールとアップグレード チュートリアル MySQL プログラム MySQL サーバーの管理 セキュリティ...