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- www.mali.com.tw
  
  Oracle SQL 教學 - 瑪力資訊股份有限公司 Mali Info Inc. Co.
  
  Oracle SQL 教學 1 關於本文件 6 2 安裝 7 2.1 Oracle8i Personal Edition 7 3 第一個例子 12 3.1 SELECT的基本語法 13 3.2 前置表格名稱 14 3.3 欄的別名 Column Alias 14 ...
  
  2025-12-11
  
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  MS SQL與Oracle判斷欄位是否為NULL的方法比較,COALESCE()、ISNULL()、NVL() - F6 Team- 點部落
  
  F6 Team "用心" by puma ... 小弟最近玩Oracle剛好想到有沒有判斷欄位為NULL的方法.. 找了很多資料..方法太多了..我在這只介紹幾種並且與MS SQL比較...
  
  2025-12-07
  
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Checking for NULL with Oracle SQL – All Things Oracle

日期：2025-12-09

I once received a check constraint something like the following from a vendor, all allegedly tested: check (sex in ('M','F',NULL)) Guess what happens with a constraint like that then? Which of the following are allowed: 'M', 'm', 'F', 'f' NULL, 'X', 'x', ...

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Oracle SQL & PL/SQL: SQL LIKE

日期：2025-12-10

SQL LIKE The SQL LIKE operator is used in a WHERE clause to look for a particular pattern in a column. Examples of SQL LIKE Now we want to select the employees which have their names starting with "s". SELECT * FROM employees WHERE ename LIKE ......

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This site contains resources to enhance your reading of Oracle SQL by Example, 4th Edition

日期：2025-12-10

Oracle SQL by Example Download the Sample Database Instructions for downloading the sample database used in the exercises and labs. Answers to Workshop Exercises Download the answers to these exercises found at the end of each chapter. Resources ......

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Real Life Database / SQL Experiences : An Oracle Blog from Vivek Sharma | Being an Oracle Profession

日期：2025-12-08

Being an Oracle Professional, I like to share all my Real Life Performance Tuning Challenges and Experiences. The Content and Views on this site are my own and not necessarily those of Oracle. While, I write on my real life experiences, the resolutions me...

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SQL: BETWEEN, IN and LIKE Operator - Oracle Forums Community

日期：2025-12-13

The above query returns the name and salary of all the employees whose have ‘J’ and ‘N’ characters in their last name. It can be KING, KHAN, KITE or KROOV etc. LIKE operator can also be used with numeric data. In such cases, it type casts the numeric into...

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SQL FAQ - Oracle FAQ

日期：2025-12-10

[edit] What is SQL and where does it come from? Structured Query Language (SQL) is a language that provides an interface to relational database systems. The proper pronunciation of SQL, and the preferred pronunciation within Oracle Corp, is "sequel" and n...

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Index your NULL table columns for fast SQL

日期：2025-12-08

Oracle index on NULL columns ... Note: Starting in Oracle 11g, there is new "create index" syntax that allows NULL values to be included in the index: create index...

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Oracle SQL - The Stanford University InfoLab

日期：2025-12-06

This document highlights some of the differences between the SQL standard and the SQL dialect of Oracle 9i. Please share with us any additional differences that you may find. Basic SQL Features Comments Data Types Indexes Views Constraints Triggers...

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