note both fields case sensitive

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SQL must know--------wildcards, calculated fields, functions

1.LIKE operator1.1 Percent percent (%) wildcard characterSELECT prod_id, Prod_name from Products WHERE prod_name like ' Fish% 'This example uses the search mode ' fish% '. When the sentence is executed, any word that begins with fish will

Detailed description of the data type and length of Mysql database fields

Next, I will provide a summary of mysql Data Types, that is, field types, including type descriptions and string lengths of different data types. I will introduce them below. I. numeric type Storage required for column typesTINYINT 1 byteSMALLINT 2

Some Usage of select case when and if

Overview:The case statement in the SQL statement and switch statement in the advanced language are standard SQL syntaxes and are applicable to multiple condition judgments. In case of different values, perform different operations. First, let's take

Naming rules on msdn

Case sensitivity Many naming conventions are related to the case sensitivity of identifiers. It is worth noting that the Common Language Runtime Library (CLR) supports case-sensitive and case-insensitive languages. The case sensitivity conventions

Database design Experience

Design | data | database | Database design A successful management system is made up of: [50% of the Business + 50% software], and 50% of the success of the software has [25% database + 25% of the program], the database design is a good or bad is a

Database design experience talk about database other

A successful management system is made up of: [50% of the Business + 50% software], and 50% of the success of the software has [25% database + 25% of the program], the database design is a good or bad is a key. The database design is the most

Oracle Database entry-level query Basics

Simple Table operation commands: create a simple table: createtablestudent (namevarchar2 (20), agenumber (3); Insert a new record: insertintostudentvalues (stone, 24); view the table structure: descstudent; query record: select * fromstudent; Delete

Crazy Java Learning Note----------5 things you don't know about the serialization of Java objects

A few years ago, when I was writing an application in the Java language with a software team, I realized the benefits of knowing a little bit more about the knowledge of Java object serialization than the average programmer .About this seriesDo you

Oracle Database entry-level query Basics

Simple Table operations Command: create a simple table: createtable student (name varchar2 (20), age number (3 )); Insert new record: insert into studentvalues ('stone ', 24 ); View the table structure: desc student; Query record: select * from

MySQL naming, design, and usage specification MySQL naming, design and use code

Database environment Dev: Development environment, development of read-write, can modify table structure. Developers can modify the table structure and can modify the data at will, but need to ensure that other development colleagues are

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