MySQL5 has three types of dates: datetime, date, and timestamp, except that date is used to indicate that a time is not taken, and the other two take seconds. The timestamp can also be accurate to milliseconds.Date is the date of YYYY-MM-DD,DATETIME
SQL Server timestamp timestampIn SQL Server Books Online, it says:The SQL Server timestamp data type is independent of time and date. SQL Server Timestamp is a binary number that indicates the relative order in which data modifications occur in the
This article transferred from: http://www.cnblogs.com/yukaizhao/archive/2010/06/02/sql-server-master-slave-mode.htmlThe size of the site to a certain extent, the points are also divided, the optimization has also been optimized, but still can not
Data types and scopes used by Microsoft Access, MySQL, and SQL Server.Microsoft Access Data type
Data Type
Description
Storage
Text
Used for text or a combination of text and numbers. A maximum of 255
Https://technet.microsoft.com/zh-cn/ff806143.aspxThe size of the site to a certain extent, the points are also divided, the optimization has also been optimized, but still can not meet the performance requirements of the business, we can consider
SQLite database processing time problem and date time functionfirst of all, the SQLite database in time processing and SQL Server also has a different oracle, the following according to their own examples summarized. A log data table was
The size of the site to a certain extent, the points are also divided, the optimization has also been optimized, but still can not meet the performance requirements of the business, we can consider the use of master-slave library.Master-Slave
Guide to MySQL upgrade
Http://blog.sina.com.cn/s/blog_5a8b8eb80100ld7a.html
We recommend that you upgrade the version from one released version to another. For example, to upgrade MySQL 3.23 to MySQL 4.0, instead of directly upgrading to MySQL 4.1
Microsoft Access Data type
Data Type
Description
Storage
Text
Used for text or a combination of text and numbers. A maximum of 255 characters.
Memo
Memo is used for a larger number
Data | database
2004-11-16
Comparison between the three most popular databases today:
MySQL Sql-server Oracle
Mysql
User variables: Set @varialname ={integer expression | real expression | string expression}
Sql-server
User variable: Declare
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