CASE() case搜索函数 1SELECT*,CASE2WHEN分数>=90THEN'优'3WHEN分数>=80AND分数<90THEN'良'4WHEN分数>=60AND分数<80THEN'中'5WHEN分数>=0AND分数<60THEN'差'END6fromuser_03 简单case函数 1SELECT*,CASEgender2WHEN'man'THEN'男'3WHEN'woman'THEN'女'END4ASgenderFROMuser_02
MySQL中的UPPERCASE函数用于将字符串中的所有字母转换为大写。这个函数在处理数据库中的文本数据时非常有用,尤其是在需要统一数据格式或者进行不区分大小写的比较时。 相关优势 统一格式:在处理用户输入或者外部数据时,使用UPPERCASE可以确保所有文本数据的一致性。 简化查询:在进行不区分大小写的搜索时,可以先将字段值...
WHERE UPPER( firstname ) = <cfqueryparam value="#UCase(url.firstname)#" cfsqltype="cf_sqlvarchar"> </cfquery> In this example (searching for a firstname) it doesn't really make sense to convert to upper case, assuming the first name is stored something likePete, and the user input...
一般语言的字符集比如GBK,UTF-8等,包含的特殊字符集是和标准的ASCII码一致的。 但有一些特殊语言的字符集,比如土耳其语,对应的特殊字符集就跟我们的不一样,它的A不是65了,a也不是67了,用toUpperCase()就不行了,需要用toLocalUpperCase(),一般情况下使用效果是一样的。
If you wanted to convert all the values in the name column to lower case or upper case permanantly, you could do this: UPDATE mytable SET name = LOWER(name); UPDATE mytable SET name = UPPER(name); There are a variety of text functions in MySQL and in this post I looked at the ...
Question: I've migrated a SQL Server database to PostgreSQL , but the table names and column names - from the original SQL Server database were a mixture of upper case and lower case. The tables were migrated but the table names remained with the mixture of the Upper case and lower ...
Can I change the case of a string in a programming language? Yes, most programming languages provide functions or methods to change the case of a string. For example, you can use the "toUpperCase" function to convert a string to uppercase or "toLowerCase" to convert it to lowercase. ...
SQLString FunctionsUpper & lower case Fastest Entity Framework Extensions Bulk Insert Bulk Delete Bulk Update Bulk Merge Example# SELECT UPPER('HelloWorld') --returns 'HELLOWORLD' SELECT LOWER('HelloWorld') --returns 'helloworld' Got any SQL Question?# ...
I think I started off my programming against t-sql pretty much doing it First Character Upper case lower case everything else. Lately though since .net I have been using upper case more. Especially when I have my sql command and dynamic parameters set in code. For me it is more readable...
Syntax The syntax for the UPPER function in SQL Server (Transact-SQL) is: UPPER( string ) Parameters or Arguments string The string to convert to uppercase.Note See also the LOWER function.Applies To The UPPER function can be used in the following versions of SQL Server (Transact-SQL): ...