select from dual oracle examples

This article will introduce some of the functions that are often used in everyday life, or that are very interesting, though they are rarely used. It is divided into two kinds of introductions, namely: Famous letters-functions that are often

This article is not ready to introduce all of the Oracle functions, in the current situation, I do not have this time, need to learn too much, to spend most of the time on learning to use the technical aspects:), so if you are ready to learn all the

This article will introduce some interesting functions that trisi often uses in daily life, or which are rarely used. There are two types of introduction: Famous functions-frequently used functions Non-famous functions-although rarely used, they are

Feel that some netizens always put forward some very basic questions, for example, there is no function to achieve such functions ah, what is the function of Ah, what the format is, and so on, but also feel their understanding of the lack of Oracle

i) Oracle Overview (1) Understand some concepts about the databaseData: In the database field, data is the basic unit of storage, including text, pictures, video, audioDatabase: The Data Warehouse, the place where the data is stored, especially the

Examples of common Oracle database functions Basic Introduction and practice of Oracle databases 1. Start (p1 ~ P2)2. SQL statement compiling ideas (p3)3. Introduction to common Oracle operators (p4 ~ P5)4. DML statements (p6 ~ P11)5. Introduction

Tag:oracle    basic function     Base Object     --# #字符函数, Case processing function Select LOWER (' ABcDe ') from dual; --ABCDE, all converted to lowercase select UPPER (' ABCDE ') from dual; --ABCDE, all converted to uppercase Select Initcap ('

Learning Oracle also for some time, found that the functions of Oracle many, for the background of the program ape, a lot of time to learn many other new things, and then remember these functions are not very realistic, so summed up some of Oracle's

I. Oracle COMMON data typesOne, data definition language (DDL)Data definition language is used to alter the database structure, including creating, changing, and deleting database objects.The data definition language commands used to manipulate the

Oracle date functions: Months_between: returns the difference of the month between two dates months_between ('01-EP-95 ', '11-Jan-94') ==> 19.6774194 add_months: Number of copies added to the date. add_months ('11-Jan-94 ', 6) ==> '11-JUL-94'