interval expr unit) --date加减expr的unit(年月日周)的date datediff(expr1,expr2) --expr1减去expr2的天数 timediff(expr1,expr2) --expr1减去expr2的的时间 date_format(date,format) --格式化日期 str_to_date(str,format) --将字符转换成日期...
create a database, and configure PostgreSQL to accept client-server connections. It also covers the many advanced features, such as transactions, versioning, replication, and referential integrity that enable developers and DBAs to use PostgreSQL for serious business applications. ...
Advanced licensing scenarios and detailed examples Licensing SQL Server for high availability and disaster recovery SQL Server Azure Hybrid Benefit Licensing SQL Server for application mobility Licensing SQL Server for non-production use Licensing SQL Server in a multiplexed application environment Additional ...
Learn to install SQL Server 2008 and navigate around Management Studio before getting right to the heart of mastering fundamental SQL Server 2008 tasks: creating tables, storing data, securing data, and retrieving it again. Dewson ensures you'll be fully prepared to use all the basics and ...
SQL Server Management Studio (SSMS) 19.1 and Recent Changes, Part 3 This is the final post in a series covering changes in SSMS 19. Please review Part 1 and Part 2 for details about Microsoft.Data.Sqlclient, MSAL, removal of the SQL Vulnerability Assessment, and mor......
On theBasicstab, select theConfigure databaselink in theCompute + storagesection, and then select theChange configurationlink: Select the desired hardware configuration: To change hardware configuration of an existing SQL Database or pool For a database, on the Overview page, select thePricing t...
On theBasicstab, select theConfigure databaselink in theCompute + storagesection, and then select theChange configurationlink: Select the desired hardware configuration: To change hardware configuration of an existing SQL Database or pool For a database, on the Overview page, select thePricing tier...
Locking and Row Versioning Basics Locking in the Database Engine Row Versioning-based Isolation Levels in the Database Engine Customizing Locking and Row Versioning Advanced Transaction Information 事务基本知识 事务是作为单个逻辑工作单元执行的一系列操作。 一个逻辑工作单元必须有四个属性,称为原子性、一致...
Download the Atlas SQL ODBC driver to connect your SQL-based tools that accept the Open Database Connectivity wire protocol. Try now!
While there’s a lot more you can do with SQL, I hope you found this overview of the basics helpful so you can get your hands dirty. With a strong foundation of the basics, you can navigate SQL better and work toward some of the more complex examples. Editor's note: This post was...