SQL学习我是在Mode上进行的,感觉还蛮好,原因有:第一,有在线Editor可以使用,边学习边练习,比读书的效率高很多;第二,有多个真实的数据库,实际操作性很强;第三,SQL学习分成三个级别,有Basic / intermediate / advanced, 每次学习之后,可以参加相应级别的challenage,通过后可以拿到Badge!(这点对我最有诱惑力,拿到Ba...
Build clear and valuable SQL reports and dashboards, and hone your skills in data cleaning and validation. In this course, you will apply all the SQL concepts and functions you have learned in previous courses to build your very own dashboard. You will work on an Olympics database to le...
I came through your article on downloading XE for database connection. I installed XE in my machine. After installing, placed the tnsnames.ora file in the Tools -> Preferences –> Database -> Advanced->TNSNamesDirectory.
Learn how to explore what's available in a database: the tables, relationships between them, and data stored in them.Start Course for Free 4 Hours16 Videos57 Exercises 117,846 LearnersStatement of Accomplishment Create Your Free Account
In this article, I will first give an overview of SSIS data types and data types conversion methods and then I will illustrate the difference between changing the columns data types from the Source Advanced editor and using Data Conversion Transformation. 01 和我从头学SQL Server Integration Service...
you are probably never going to alter these stored procedures. They are calling the internal workings of theSSIS catalog. You can see the code in this stored procedure by right-clicking on it and selecting “Script Stored Procedure as” ⇒ “Alter to” ⇒ “New Query Editor Window.” Th...
In this article, I will first give an overview of SSIS data types and data types conversion methods and then I will illustrate the difference between changing the columns data types from the Source Advanced editor and using Data Conversion Transformation. ...
Accompanied at every step with hands-on practice queries, this course teaches you everything you need to know to analyze data using your own SQL code today!
Learning SQL is crucial for anyone aspiring to be a data analyst, data engineer, or data scientist, and helpful in many other fields such as web development or marketing. In this cheat sheet, you'll find a handy list of functions covering querying data, filtering data, aggregation, and ...
JMETER是一款开源的性能测试工具,用于模拟多种负载条件下的应用程序性能测试。它可以帮助开发人员和测试人员评估应用程序在不同负载下的性能表现,并发现潜在的性能瓶颈和问题。 在性能测试中,SP(Stored Procedure)是指存储过程,它是一组预编译的SQL语句集合,可以在数据库中进行复杂的数据操作和逻辑处理。然而,JMETER默认...