關於 sql select case when ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. Understanding the SQL CASE Statement and its many uses

The SELECT statement with a simple CASE expression ... In this type of CASE statement, we use equality check expressions. The following query ...

#12. SQL Server: CASE Statement - TechOnTheNet

The CASE statement can be used in SQL Server (Transact-SQL). ... SELECT contact_id, CASE WHEN website_id = 1 THEN 'TechOnTheNet.com' WHEN website_id = 2 THEN ' ...

#13. Practical SQL: Select Case When. Hands-on tutorial with MySQL

SQL is used by most relational database management systems (RDBMS) to manage data stored in tabular form (i.e. tables).

#14. The SQL Procedure : CASE expression - SAS OnlineDoc, V8

You can use CASE expressions in the SELECT, UPDATE, and INSERT statements. Example. The following two PROC SQL steps show two equivalent CASE expressions that ...

#15. How to Use IF...THEN Logic in SQL Server | Tutorial by Chartio

Before we examine the special CASE aspect of this statement, let's temporarily remove the CASE to notice that this is an extremely simple SELECT statement ...

#16. CASE Statement & Nested Case in SQL Server: T-SQL Example

CASE Statement in SQL Server is the extension of IF…ELSE statement. Unlike IF…ELSE, where only the maximum of one condition is allowed, CASE ...

#17. CASE expressions - Db2 SQL - IBM

Ends a case-expression. If a CASE expression is in a select list that derives the final result table, and if the simple-when-clause ...

#18. CASE - Snowflake Documentation

The value returned from the function has the highest-precedence collation of the THEN / ELSE arguments. Examples¶. This shows a typical use of CASE : SELECT ...

#19. Documentation: 7.4: Conditional Expressions - PostgreSQL

The SQL CASE expression is a generic conditional expression, ... SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' WHEN a=2 THEN 'two' ELSE ...

#20. SQL CASE

Le CASE peut être utilisé dans n'importe quelle instruction ou clause, telle que SELECT, UPDATE, DELETE, WHERE, ORDER BY ou HAVING.

#21. CASE Expressions

ELSE logic in SQL statements without having to invoke procedures. ... SELECT cust_last_name, CASE credit_limit WHEN 100 THEN 'Low' WHEN 5000 THEN 'High' ...

#22. 使用SQL CASE 陳述式

它是一個功能強大的資料庫開發和管理工具，可以同時連線到大部分受歡迎的資料庫，包括MySQL、MariaDB、MongoDB、SQL Server、Oracle、PostgreSQL 和SQLite ...

#23. Using Oracle CASE Expression By Practical Examples

Oracle CASE expression allows you to add if-else logic to SQL statements ... For example, you can use the CASE expression in statements such as SELECT ...

#24. SQL CASE works in practically all SQL-Databases - Modern ...

SQL CASE changes the result based on conditions. CASE works in MySQL, PostgreSQL, Oracle, ... SELECT CASE WHEN id = 0 THEN 1/0 ELSE 1 END AS hit FROM demo ...

#25. Using Case With Select and Update Statement in SQL Server ...

Case Expression with Select Statement · Select Stu_Id,Stu_Name,Marks, · Case When Marks > 32 Then 'Pass' Else 'Fail' · End as Remarks, · Case When ...

#26. SQL Expressions, Complex CASE - ABAP Keyword ...

SQL Expressions, Complex CASE. ... This example demonstrates complex case distinctions in SQL expressions. Source Code ... SELECT num1, num2, CASE WHEN num1 ...

#27. How CASE WHEN Works - The Data School

If you try to compare incompatible types SQL will return an “Invalid Input Syntax” error. Same Data Type. SELECT Track.Name, Track.

#28. 9.18. 條件表示式 - PostgreSQL 正體中文使用手冊

SQL 中的CASE 表示式是一種通用的條件表示式，類似於其他程序語言中的if / else 語句 ... CASE子句可用於任何表示式有效的地方。 ... 這與C 語言中的switch 語句類似。

#29. Case Statement in SQL – Example Query - freeCodeCamp

If you know other languages, the case statement in SQL is similar to an if statement, or a switch statement. It allows you to conditionally ...

#30. SQL CASE Function | BigQuery Syntax and Examples - Count ...

The CASE function allows you to perform conditional statements in SQL. ... SELECT colour, CASE WHEN colour IN ('blue', 'red', 'yellow') THEN true ELSE false ...

#31. Using CASE to Add Logic to a SELECT | LearnSQL.com

As you write an SQL query, you may need to get values from multiple columns and change values from one form to another. The simple way to ...

#32. PostgreSQL CASE

In this tutorial, we will show you how to use the PostgreSQL CASE ... To apply this logic, you can use the CASE expression in the SELECT statement as ...

#33. How to Use the SQL CASE Expression with Values - dummies

... SQL CASE expression if you're comparing a test value for equality with a series of other values. This form is useful within a SELECT or UPDATE statement ...

#34. SQL利用Case When Then多條件- IT閱讀

ELSE '其他' END; 同樣的，我們也可以用這個方法來判斷工資的等級，並統計每一等級的人數。SQL代碼如下； SELECT CASE WHEN salary <= 500 THEN '1'

#35. CASE語法介紹 - Oracle SQL學習筆記本

select case salary when salary>1000 then 500. when salary>2000 then 600. else 400 end;. from emp;. 說明:在emp表格裡如果salary欄位的薪水大於1000就為500, ...

#36. CASE expression - Amazon Redshift

CASE is a conditional expression similar to if/then/else statements found in ... select venuecity, case venuecity when 'New York City' then 'Big Apple' else ...

#37. Pragmatic Guide to SQL Server CASE Expression

B) Using simple CASE expression in aggregate function example. See the following query: SELECT SUM(CASE WHEN order_status = 1 THEN ...

#38. SQL 查询：SELECT CASE 条件赋值 - 盖若

SQL 查询：SELECT CASE 条件赋值. 更新时间：2021-06-26 10:04:18 标签： sql case. 好消息！ 本教程作者所著新书《深入浅出Pandas：利用Python进行数据处理与 ...

#39. Case Statement using SQL (examples included) - Data to Fish

new_field_name: discount. So the complete syntax would look like this: SELECT name, age, CASE WHEN age >= 60 THEN 'senior discount' ELSE ' ...

#40. Dirty Secrets of the CASE Expression - SQLPerformance.com

Detailed guide with T-SQL CASE expression explanation, examples, ... SELECT StatusLabel = CASE [status] WHEN 'A' THEN 'Authorized' WHEN 'C' ...

#41. CASE construct - Firebird

The results don't have to be literal values: they may also be field or variable names, compound expressions, or NULL literals. Example: select name, age, case ...

#42. How do I use a case statement in the where clause in SQL ...

CASE STATEMENT IN WHERE CLAUSE:. “How do I use a case statement in the where clause in SQL Server?” is published by Vaishali Goilkar.

#43. The Ultimate Guide To SQL CASE Expression

The SQL CASE expression allows you to evaluate a list of conditions and returns one of the possible results. The CASE expression has two formats: simple CASE ...

#44. SQL Code – CASE in select with WHEN (1=1)? | Toolbox Tech

SQL Code – CASE in select with WHEN (1=1)? ... Hi all, Can someone provide a little education please? ... that have just been in the WHERE clause?

#45. case statement in sql | case in sql - Tech Altum Tutorial

Sometimes we need to display data in different manner, in this situation we can use case statement with select query. Example of Case. Suppose we have the ...

#46. SQL | Case Statement - GeeksforGeeks

In this post, we explore the Case-Switch statement in SQL. The CASE statement is SQL's way of handling if/then logic. Syntax: There can be two ...

#47. CASE clause | Databricks on AWS

Learn how to use the CASE syntax of the SQL language in Databricks. ... SELECT id, CASE id WHEN 100 then 'bigger' WHEN id > 300 THEN '300' ...

#48. CASE WHEN 及SELECT CASE WHEN的用法 - CSDN博客

3）、此外，还有一个需要注意的问题，Case函数只返回第一个符合条件的值，剩下的Case部分将会被自动忽略。 --比如说，下面这段SQL，你永远无法得到“第二类 ...

#49. SQL CASE Statement Explained with Examples - Database Star

It's good for displaying a value in the SELECT query based on logic that you have defined. As the data for columns can vary from row to row, using a CASE SQL ...

#50. PL/SQL - CASE Statement - Tutorialspoint

Like the IF statement, the CASE statement selects one sequence of statements to execute. However, to select the sequence, the CASE statement uses a selector ...

#51. CASE condition & value matching in SELECT Query - Plus2net

CASE WHERE ELSE Sql There are two different types of CASE quires. One is matching value and other one is matching condition.

#52. [T-SQL] CASE語法| Dorlis's 技術記錄 - 點部落

摘要:[T-SQL] CASE語法. ... select case when convert(sysname,serverproperty('Servername')) like '%\%' then 'MSSQL$' + @@servicename else ...

#53. CASE Clause - Spark 3.2.0 Documentation

Spark SQL Guide · Getting Started · Data Sources · Performance Tuning · Distributed SQL Engine · PySpark Usage Guide for Pandas with Apache Arrow · Migration Guide ...

#54. CASE Statements in PostgreSQL - DataCamp

Common conditional expressions include if-else blocks and switch cases. You can formulate conditional expressions in PostgreSQL using ...

#55. SQL Tutorial => Shorthand CASE in SELECT

CASE 's shorthand variant evaluates an expression (usually a column) against a series of values. This variant is a bit shorter, and saves repeating the ...

#56. SQL Tutorial - CASE Statements - YouTube

#57. switch - JavaScript - MDN Web Docs

使用 switch · 如果我忘記break 會發生什麼事？ · 我可以在cases 中間放default 嗎？ · 同時使用多個條件 case 的方法 · Block-scope variables within switch statements.

#58. select case when与IF的用法_11994792的技术博客

select case when 与IF的用法，casewhen概述sql语句中的case语句与高级语言中的switch语句类似，是标准sql的语法，适用于一个条件判断有多种值的情况下 ...

#59. Oracle – Usando a expressão Case - PL/SQL - MasterTraining

A expressão CASE executa a lógica if-then-else em SQL . ... SELECT product_id, product_type_id, CASE product_type_id WHEN 1 THEN 'Book' WHEN 2 THEN 'Video' ...

#60. CASE Expressions And Statements in Oracle

The CASE expression was first added to SQL in Oracle 8i. ... SELECT ename, empno, deptno, (CASE deptno WHEN 10 THEN 'Accounting' WHEN 20 THEN 'Research' ...

#61. Conditional Expressions — Presto 0.265.1 Documentation

The standard SQL CASE expression has two forms. ... SELECT a, CASE a WHEN 1 THEN 'one' WHEN 2 THEN 'two' ELSE 'many' END Copy to clipboard.

#62. Оператор CASE - SQL-tutorial.ru

Оператор CASE стр. 1 · SELECT DISTINCT product.model, · CASE · WHEN price IS NULL · THEN 'Нет в наличии' · ELSE CAST(price AS CHAR(20)) · END price · FROM Product LEFT ...

#63. SQL之case when then用法- I'm Me! - 博客园

SQL > select u.id,u.name,u.sex, 2 (case u.sex 3 when 1 then '男' 4 when 2 then '女' 5 else '空的' 6 end 7 )性别8 from users u; ...

#64. SQL之CASE WHEN用法详解 - 知乎专栏

简单CASE WHEN函数CASE SCORE WHEN 'A' THEN '优' ELSE '不及格' END CASE ... SELECT STUDENT_NAME, (CASE WHEN score < 60 THEN '不及格' WHEN ...

#65. Conditional Processing using the Case Expression in PROC ...

among columns and values. The SQL procedure allows the identification and assignment of data values in a SELECT statement using case-expressions.

#66. CASE - Data Studio Help - Google Support

CASE defines one or more conditions and returns a result when a condition is met. ... You can use this technique to let users switch the breakdown dimension ...

#67. Conditional expressions | BigQuery | Google Cloud

WITH Numbers AS (SELECT 90 as A, 2 as B UNION ALL SELECT 50, 8 UNION ALL SELECT 60, 6 UNION ALL SELECT 50, 10) SELECT A, B, CASE A WHEN 90 THEN 'red' WHEN ...

#68. Case When Exists SQL | PeopleSoft Wiki

The Case-When-Exists expression in Oracle is really handy. Here's an example of how to use it in a sub-select to return a status. This SQL checks for a ...

#69. Can I have a CASE Statement in the WHERE Clause?

There are a number of examples using the CASE WHEN construct in SQL, such as the SELECT columns or in ORDER BY clauses, but we tend to ...

#70. [SQL Server] 條件判斷式Case When Then 的用法 - 黑白倫的日誌

假設今天是要抓取水果價格,但是販售價格因為物價上漲,所以都有幅度上調漲 這樣的話可以這樣寫. Select 水果, (Case 水果 When '香蕉' Then 價格+10

#71. MySQL CASE Expressions Explained By Practical Examples

In this tutorial, you will learn how to use the MySQL CASE expression to add if-else logic to SELECT, WHERE, and ORDER BY of a query.

#72. MySQL 5.7 Reference Manual :: 13.6.5.1 CASE Statement

Each statement_list consists of one or more SQL statements; an empty statement_list is not permitted. To handle situations where no value is matched by any WHEN ...

#73. CASE Statements - Oracle PL/SQL Programming, Third ...

CASE Statements New to PL/SQL in Oracle9i, the CASE statement allows you to select one sequence of statements to execute out of many possible sequences.

#74. SQL CASE Statement - Tutorial Gateway

Simple Case Statement: The simple SQL case statement compares the input_expression to a series of test_expressions, followed by the WHEN keyword ...

#75. SQL中的case when then else end用法- SegmentFault 思否

case end干啥的. 类似于python中的if else判断, CASE一个字段, when这个字段的值是'1'的时候返回'男', '2'返回'女'. END结束as一个标题sex. SELECT ...

#76. Nested case statements vs multiple criteria case statements

CREATE DATABASE [239583]; GO USE [239583]; GO SELECT TOP 10000000 CASE WHEN v.number % 2 = 0 THEN CAST(1 AS bit) ELSE ...

#77. 16.20 - CASE and Nulls - Advanced SQL Engine - Teradata ...

SELECT CASE WHEN column_1 IS NULL THEN 'NULL' END FROM table_1;. Often, Teradata Database can detect when an expression that always evaluates to NULL is ...

#78. How to Write Case Statement in WHERE Clause? - SQL ...

... 'Roger', 'Croc' GO SELECT FirstName, LastName FROM Contacts GO. Now we will see our solution with a CASE expression in the WHERE clause.

#79. SQL ORDER BY CASE | Defining the Order of Certain Columns

The syntax of the ORDER BY clause along with case statement is as shown above. It is the optional clause used in the select clause whenever we need to ...

#80. Postgres CASE Statement Basics by Example - Panoply Blog

CASE statements are a pretty simple way to up your SQL game and are useful for returning ... SELECT (always begin with a SELECT statement).

#81. SQL中的CASE WHEN使用- 云+社区 - 腾讯云

生成一个带有洲Code的View，是一个解决方法，但是这样很难动态的改变统计的方式。 如果使用Case函数，SQL代码如下: SELECT SUM(population), CASE country ...

#82. Case with Wildcards – SQLServerCentral Forums

I am having trouble with a CASE statement like this. The All Cars doesn't work. SELECT. CASE. WHEN CARS.Model LIKE '%Ford%' THEN 'Ford'.

#83. T-SQL static code analysis: Related "IF"/"ELSE IF" statements ...

Related "IF"/"ELSE IF" statements and "WHEN" clauses in a "CASE" should not have the same condition. Analyze your code. Bug. Major ...

#84. Spark SQL CASE WHEN on DataFrame - Examples - DWgeek ...

Following example executes the CASE statement. It uses Spark SQL context to execute queries. >>> sqlContext.sql(" SELECT CASE 1 WHEN 1 THEN 'ONE ...

#85. Spark SQL "case when" and "when otherwise"

Like SQL "case when" statement and Swith statement from popular programming languages, Spark SQL ... when can also be used on Spark SQL select statement.

#86. SQL CASE WHEN condition THEN NumericColumn ELSE 0 ...

Be careful with CASE WHEN when dealing with numeric columns and using zero literal. ... SQL. Copy Code. SELECT (CASE WHEN TableName.

#87. How to Write a Case Statement in Redshift - PopSQL

Case statements are useful when you're dealing with multiple IF statements in your select clause. It comes in two forms: -- Redshift documentation calls ...

#88. 深入理解SQL case when - w3c菜鳥教程

深入理解SQL case when,當在用case when 進行多條件處理時，首先case ... 貼兩個例子由左圖得到右圖，可用如下sql select case when chnl type id 100 ...

#89. CASE to set a variable value in SQL Server - Tech Funda

To set a variable value in SQL server based on true / false result, CASE ... 31 DECLARE @isExists varchar(55) SET @isExists = CASE WHEN EXISTS (SELECT ...

#90. SQL CASE Statement with Boolean - LabKey Support

sql.Query$QueryInternalException"). SELECT CASE WHEN Message.gender = 'M' then true. ELSE false. END as booleanTest

#91. SQL中Case When的用法-为你的数组呈现提供更多的可能

一、用Zoomla!逐浪CMS表来作三个演示. 示例一： select sum(userid), case username when 'admin' then ...

#92. Understanding SQL server switch case (With Example)

Understanding SQL server switch case (With Example) ... When working with the database, we may sometimes require to fetch data from the database ...

#93. Calculating results with CASE | More advanced SQL queries

It's giving me an error saying there's a syntax error near the SELECT, on the last line. I can't figure out what it is. Any help would be greatly appreciated.

#94. What is a CASE Statement in the SQL? - JanBask Training

For example, the CASE statement can be used in statements such as Update, Select, Insert, Delete, Set, etc. the popular clauses where Case ...

#95. Conditional Functions And Expressions | Elasticsearch Guide ...

Elasticsearch Guide [master] » SQL » Functions and Operators ... SELECT CASE WHEN 1 > 2 THEN 'elastic' WHEN 2 <= 3 THEN 'search' END AS "case"; case ...

#96. [SQL server] IF ELSE 和CASE WHEN 的用法 - 编程猎人

判断一个数如果大于10，按10统计，如果小于0，按0统计*/ --方法a DECLARE @AA INT SET @AA=15 IF @AA>10 SELECT 10 ELSE IF @AA<0 SELECT 0 ELSE SELECT @AA --方法b ...

#97. Example Uses of the MONTH Date Function - SQL Server ...

SQL Server Helper - Tip of the Day ... SELECT CASE WHEN MONTH(GETDATE()) IN (1, 3, 5, 7, 8, 10, 12) THEN 31 WHEN MONTH(GETDATE()) IN (4, 6, 9, ...

#98. Re: [SQL ] 有關case when的兩個問題- 看板Database - 批踢踢 ...

直接把case條件式寫在where後試試select * from 資料表A as A join 資料表B as B on A.no = B.no where (case when B.redate is null then.

#99. sql 语句中的case when in 与exists - 简书

select case when exists(select 1 from t_test c where c.name = 'zhangsan' and c.age = 23 ) then 1 else 0 end from dual; ...