1). 通过两条 sql 查询: selectmanager_idfromemployeeswherelower(last_name)='chen'--返回的结果为 108select*fromemployeeswhereemployee_id=108 2). 通过一条 sql 查询(自连接): selectm.*fromemployees e, employees mwheree.manager_id = m.employee_idande.last_name ='Chen' 3). 通过一条 sql ...
Oracle PL/SQL best practice 开发技术 - 其它美成**罪恶 上传2.55MB 文件格式 ppt oracle best practice pl/sql This PPT is about the most important features and critical best practices presented by Steven Feuerstein, a guru of Oracle PL/SQL language....
Oracle PL/SQL Best Practice 作者:Steven Feuerstein 一本简短的书,介绍了几十种编程的最佳实践,帮助程序员提高PL/SQL编码质量。这本书就像是一个PL/SQL专家写的“经验教训总结”。第2版的内容进行了完全的重编,内容是为一个虚构公司进行代码开发时,开发团队面对挑战所进行的最佳实践。本书还有对应的网站:http:...
Online Oracle PLSQL For Practice Our Online Oracle PLSQL Compiler can be used for any kind of situation. It can be used for school, for work, or even just for fun: You can use it to practise and improve your Oracle PLSQL skills. ...
This Oracle tutorial explains how to use the OracleCREATE TABLE statementwith syntax, examples, and practice exercises. Description The Oracle CREATE TABLE statement allows you to create and define a table. Syntax The syntax for the CREATE TABLE statement in Oracle/PLSQL is: ...
This Oracle tutorial explains how to use the Oracle SELECT statement with syntax, examples, and practice exercises. The Oracle SELECT statement is used to retrieve records from one or more tables in an Oracle database.
The PL SQL course further tells how to make unknown PL/SQL blocks, stored procedures, and functions. Students learn about declaring identifiers and trapping exceptions. Presentations and hands-on practice reinforce the key concepts. Advantages of PL/SQL: Procedural Language Support: PL/SQL is a ...
End-of-chapter projects bring together all the techniques youve learned, strengthening your understanding through real-world practice. This books approach fully reflects the authors award-winning experience teaching PL/SQL programming to professionals at Columbia University. New database developers and ...
End-of-chapter projects bring together all the techniques youve learned, strengthening your understanding through real-world practice. This books approach fully reflects the authors award-winning experience teaching PL/SQL programming to professionals at Columbia University. New database developers and ...
SQL Functions PL/SQL lets you use all the SQL functions including the following aggregate functions, which summarize entire columns of Oracle data:AVG,COUNT,GROUPING,MAX,MIN,STDDEV,SUM, andVARIANCE. Except forCOUNT(*), all aggregate functions ignore nulls. ...