ACASEstatement can have an optionalELSEclause. TheELSEclause is executed if none of the conditions in theCASEstatement is matched. Syntax SELECTcustomer_id, first_name,CASEWHENcondition1THENresult1WHENcondition2THENresult2-- Add more WHEN conditions and results as neededELSEelse_resultENDASalias_nam...
14.1.1 ALTER DATABASE Syntax,可用于修改数据库字符集和校验规则 查看校验规则可如下: 由于utf8的校验规则都是ci(case insensitive),所以是不区分大小写, 如 但可以这样,加上binary 14.1.2 ALTER EVENT Syntax 事件修改语法 可修改其执行计划,可禁用与启用该事件执行,可重名该事件【ALTER EVENT ... RENAME TO ...
SELECT first_name FROM student_details; SELECT Statements: SyntaxNOTE: SQL commands are not case sensitive. The above SELECT statement can also be written as"select first_name from students_details;" You can also retrieve data from more than one column. For example, to select first name and ...
1topics: #CASE的两种基本用法2CASE OPERATOR3CASE STATEMENT45MariaDB [mysql]> helpcasestatement; #case的第一种用法6Name: 'CASE STATEMENT'7Description:8Syntax:9CASE case_value10WHEN when_value THEN statement_list11[WHEN when_value THEN statement_list] ...12[ELSE statement_list]13END CASE1415Or...
The simple CASE statement has the following structure: CASE selector WHEN selector_value_1 THEN statements_1 WHEN selector_value_1 THEN statement_2 ... ELSE else_statements END CASE; Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) Let’s examine the syntax of the simple CASE ...
To left join query, using the syntax of the case after on (Similar example appeares in my own project) select * from AIRPORTORDER as A inner join RANGECODE as B on case when A.AIRPORDER_GOORBACK='2' then A.AIRPORDER_ENDCODE
SQL keywords are NOT case sensitive:selectis the same asSELECT In this tutorial we will write all SQL keywords in upper-case. Semicolon after SQL Statements? Some database systems require a semicolon at the end of each SQL statement. ...
TheSELECTstatement is used to select data from a database. Example Return data from the Customers table: SELECTCustomerName, CityFROMCustomers; Try it Yourself » Syntax SELECTcolumn1,column2, ... FROMtable_name; Here, column1, column2, ... are thefield namesof the table you want to ...
Finding and Correcting SQL Select Errors Sooner or later you’ll mistype a select statement into the command line and the computer will yell at you —“Syntax Error!” or “Invalid Column Name” What to do? Just remember that the select statement is made up of two main parts: the SELECT...
B. Use a SELECT statement with a searched CASE expression Within aSELECTstatement, the searchedCASEexpression allows for values to be replaced in the result set based on comparison values. The following example displays the list price as a text comment based on the price range for a product. ...