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

#11. Sql中的case函數和子查詢 - 每日頭條

Select Id ,Name ,Gender case Classid when 1 then '023班' when 2 then '024班' when 3 then '025班』 else '非本專業' end as '班級' from Teacher ...

#12. SQL CASE | Intermediate SQL - Mode

The CASE statement always goes in the SELECT clause · CASE must include the following components: WHEN , THEN , and END . · You can make any conditional statement ...

#13. SQL Server CE 用Select Case 來將欄位NULL值轉為0 - 點部落

後來找到用以下SQL，結果就正確了(將欄位NULL值轉為0)，我也不知為何會這樣... SELECT (CASE WHEN PUR_AMT IS NULL THEN 0 ELSE PUR_AMT END) PUR_AMT

#14. 9.18. 條件表示式 - PostgreSQL 正體中文使用手冊

如果沒有任何WHEN 條件成立，則CASE 表示式的值是ELSE 子句的結果。如果省略了ELSE 子句並且沒有條件為真，則結果為null。 範例：. 1. SELECT * FROM test;.

#15. CASE expression - IBM

CASE expressions allow an expression to be selected based on the ... CASE searched-when-clause simple-when-clause ELSE NULL ELSE result-expression END 1.

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

CASE works in MySQL, PostgreSQL, Oracle, SQL Server, DB2… ... SELECT CASE WHEN id = 0 THEN 1/0 ELSE 1 END AS hit FROM demo ...

#17. SQL Server T-SQL CASE Statement Examples - MS SQL Tips

CASE can not only be used in SELECT statements, but at any other place where an expression can be written. This includes UPDATE, DELETE, SET, ...

#18. [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

#19. 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).

#20. 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 ...

#21. SQL Case Statement in Oracle - DBA Genesis Support

Oracle SQL CASE statement gives you the flexibility to use sql IF ELSE logic in a SELECT, WHERE and JOIN clause. · For example, let us assume we ...

#22. OR is not supported with CASE Statement in SQL Server

You can use CASE expressions anywhere in the SQL queries. CASE expressions can be used within the SELECT statement, WHERE clauses, Order by clause, ...

#23. SQL 查询：SELECT CASE 条件赋值 - 盖若

CASE 类型于编程中的if else，可以将查询出的值按条件翻译成指定的内容，本文将介绍case when then 的用法和使用场景。

#24. switch - JavaScript - MDN Web Docs

In the following example, if expr evaluates to "Bananas", the program matches the value with case "Bananas" and executes the associated statement. When break is ...

#25. SQL CASE

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

#26. 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 ...

#27. 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; ...

#28. 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 ' ...

#29. 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 ...

#30. CASE Expressions

In a simple CASE expression, Oracle Database searches for the first WHEN . ... SELECT cust_last_name, CASE credit_limit WHEN 100 THEN 'Low' WHEN 5000 THEN ...

#31. 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 ...

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

Query 2: SIMPLE CASE with the ELSE option. SELECT Tutorial_ID, Tutorial_name, CASE Tutorial_name WHEN 'SQL' THEN 'SQL is developed by IBM' WHEN ...

#33. PostgreSQL CASE

When a condition evaluates to false , the CASE expression evaluates the next ... SELECT title, length, CASE WHEN length> 0 AND length <= 50 THEN 'Short' ...

#34. SQL語句case when外用sum與count的區別 - IT人

SELECT SUM (CASE WHEN price <= 1000 THEN 1 ELSE 0 END)AS low, ... select u.creator_id 建立者ID, sum( case u.sex when 1 then 1 else 0 end) ...

#35. CASE - Snowflake Documentation

When a condition evaluates to TRUE, the evaluation stops and the ... SELECT column1, CASE WHEN column1=1 THEN 'one' WHEN column1=2 THEN 'two' ELSE 'other' ...

#36. select case when sql Code Example

NOTE: this is for SQL-Oracle specifically /* NB: Please like Mingles444 post, I derived this from him/her */ -- syntax: (Retrieved from grepper:Mingles444) ...

#37. [SQL] CASE…WHEN 進行排序和分組 - 程式前沿

SQL CASE …WHEN 進行排序和分組基本排序置頂單行資料並將其他資料排序select * from tb_schedule_zy order by (case schedule_id when '1' then 0 else ...

#38. 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 ...

#39. SQL 中case when ...then...else ...end用法 - CSDN博客

根据这个国家人口数据，统计亚洲和北美洲的人口数量。使用如下SQL： SELECT CASE country WHEN '中国' THEN '亚洲' ...

#40. 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 ...

#41. 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 ...

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

START-OF-SELECTION. demo=>main( ). Description. In a list of columns specified after SELECT, CASE is ...

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

This form is useful within a SELECT or UPDATE statement if a table contains a limited number of values in a column and you want to associate a corresponding ...

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

THEN logic in SQL Server, which allows users to execute programmatic logic on ... SELECT CASE WHEN books.title = 'The Hobbit' THEN 'Middle-earth' WHEN ...

#45. SQL SELECT CASE - 老黃的電腦窩

Select Case Statement: Microsoft Access is a very versatile data-handling tool. There are numerous control statements that turn the program ...

#46. SQL CASE Expression - TIBCO Documentation

You can use CASE expressions in the select list of SELECT statements. A CASE expression is used like an if-then-else construct to conditionally return a ...

#47. SQL | Case Statement - GeeksforGeeks

These are found in SQL too, and should be exploited for uses such as query filtering and query optimization through careful selection of tuples ...

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

In this table in gender column the data is 'f' for female and 'm' for male. If we run normal select query it will show data in same format but I want that it ...

#49. 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 ...

#50. SQL中Case的使用方法

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' WHEN ...

#51. SELECT CASE SQL中的DISTINCT COUNT - MYSQL _程式人生

我有一個報告表，其中包括欄位 Case （唯一編號）、 ISR （個別安全報告- ... SELECT COUNT(CASE WHEN `YearsOld` = -2) THEN 1 END) `No Report`, ...

#52. CASE OPERATOR - MariaDB Knowledge Base

CASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN result . ... SELECT CASE 1 WHEN 1 THEN 'one' WHEN 2 THEN 'two' ELSE 'more' END; ...

#53. 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' ...

#54. [程式][SQL] CASE 類似於程式語言裡的if/then/else 語句

CASE 是SQL 用來做為if-then-else 之類邏輯的關鍵字。 CASE 的語法如下： CASE WHEN condition THEN result [WHEN&. ... select Name, case Answer. when 1 then '喜歡 ...

#55. 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 ...

#56. 寫了那麼久SQL，你用過CASE表達式嗎？ - 壹讀

CASE sex WHEN '1' THEN '男' WHEN '2' THEN '女'ELSE '其他' END ... SELECT CASE city WHEN '哈爾濱' THEN '黑龍江' WHEN '齊齊哈爾' THEN '黑龍江' ...

#57. 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 ...

#58. Оператор CASE - SQL-tutorial.ru

Чтобы заменить NULL-значения нужным текстом, можно воспользоваться оператором CASE: Консоль. Выполнить. SELECT DISTINCT product.model,. CASE. WHEN price IS ...

#59. Using Oracle CASE Expression By Practical Examples

When you use the searched CASE expression within a SELECT statement, you can replace values in the result based on comparison values. The following example uses ...

#60. Case When 中如果條件式要寫LIKE要怎麼寫 - 藍色小舖

如果下面的SQL指令要判斷D 欄位like '%2'，要怎麼寫啊？ 我試過直接改成WHEN LIKE '%1' THEN '1st'，結果不行. SELECT A, B, C, CASE D WHEN '14' ...

#61. CASE construct - Firebird

Description: A CASE construct returns exactly one value from a number of ... select name, age, case upper(sex) when 'M' then 'Male' when 'F' then 'Female' ...

#62. SELECT CASE WHEN IN() statement - Microsoft SQL Server

SELECT CASE WHEN IN() statement. Microsoft SQL Server Forums on Bytes.

#63. SQL Tutorial => Selecting with CASE

Example#. When results need to have some logic applied 'on the fly' one can use CASE statement to implement it. SELECT CASE WHEN Col1 < 50 THEN 'under' ELSE ...

#64. 条件表达式 - 阿里云帮助文档

示例2：统计不同请求时间的分布情况。 查询和分析语句. * | SELECT CASE WHEN request_time < 10 then 't10' WHEN request_time < ...

#65. SQL Server CASE - javatpoint

The CASE expression can be used anywhere a valid program or query is used like SELECT, WHERE, and ORDER BY clause. Its main function is to manage multiple IF ...

#66. 【SQL學習筆記4】case when 和if的用法

select p_day,doc_id, case when click>0 then '點選' when click<0 and rview>0 then '曝光未點選' when rview<0 and vview>0 then '下發未點選' ...

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

Detailed guide with T-SQL CASE expression explanation, examples, and common misconceptions, ... SELECT CASE WHEN @foo = 1 THEN (SELECT foo, ...

#68. CASE WHEN 用法 - 简书

一、用法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。 ... SELECT country, SUM( CASE WHEN sex = '1' THEN population ELSE 0 ...

#69. How CASE WHEN Works - The Data School

How CASE WHEN Works · How case when works: adds value to new column · Image showing how the query results look with and without an additional column selected ...

#70. CASE expression - Amazon Redshift

CASE is used to specify a result when there are multiple conditions. ... select pricepaid, case when pricepaid <10000 then 'group 1' when pricepaid >10000 ...

#71. Dax equivalent to sql select case when within group by

Solved: Hello, I am trying to write with DAX the following SQL query I know that case when equivalent is switch statement and group by is ...

#72. 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 ' ...

#73. Oracle SQL CASE 簡單用法教學 - 程式開發學習之路

關鍵詞(keyword): case 簡單CASE case 來源where 等於什麼值then 是的輸出值 else 否的輸出值 end "別名" 例： 使用employees. SELECT employee_id,

#74. 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?

#75. Efficient way to handle multiple CASE statements in SELECT

SELECT (case A.column1 when '1' then (select value from B where B.clientId ...

#76. 在SQL Server中执行嵌套case语句逻辑的最佳方法 - 码农家园

Best way to do nested case statement logic in SQL Server我正在写一个SQL查询， ... SELECT col1, col2, col3, CASE WHEN condition. THEN CASE

#77. case表达式_百度百科

Case 表达式，是可以在sql中使用if ..then..else的逻辑判断，而避免使用PL/SQL的有效 ... select case when id between 1 and 10 then 'low' when id between 20 and 30 ...

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

In this article, we learn about the Column From Example option in Power Query Editor. We can create the new column examples from a selection, or provide input ...

#79. SQL Tutorial - CASE Statements - YouTube

#80. SQL~~CASE, NULLIF() and ISNULL() - 石頭閒語

select left_table.barcode, left_table.input_qty, case when right_table.output_qty is NULL then 0 else right_table.output_qty end as ...

#81. sql - 在PostgreSQL 中使用CASE 一次影响多个列

我有一个Postgres SELECT 带有这些表达式的语句: ,CASE WHEN (rtp.team_id = rtp.sub_team_id) THEN 'testing' ELSE TRIM(rtd2.team_name) END AS testing_testing ...

#82. 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' ...

#83. CASE (SQL-92 Compatible) - FairCom

The following example shows a searched CASE expression and an equivalent simple CASE expression. - Searched case expression: SELECT tbl,. CASE.

#84. A Simple Use of SQL CASE Expression - CodeProject

CASE expression is mostly used in SQL stored procedure or as a ... DECLARE @intInput INT SET @intInput = 2 SELECT CASE(@intInput) WHEN 1 ...

#85. The Ultimate Guide To SQL CASE Expression

Suppose the current year is 2000. We can use the simple CASE expression to get the work anniversaries of employees by using the following statement: SELECT ...

#86. 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 ...

#87. Structured Query Language/SELECT: Case Expression

... plenty of places within SQL commands. On this page, we focus on its use together with the SELECT command. The strategy and syntax for CASE within INSERT ...

#88. Case insensitive SQL SELECT query examples - Alvin ...

The SQL standard way to perform case insensitive queries is to use the SQL upper or lower functions, like this: select * from users where upper( ...

#89. CASE (SQL) - InterSystems Documentation

The Simple CASE expression tests a series of value expressions (specified by a WHEN clause) to see if they are equal to a given value expression: SELECT ...

#90. 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 ...

#91. SQL CASE Statement with Multiple Conditions - CodingStatus

By using it, we can filter & optimize queries through selection rows that satisfied our requirements. We can also use it in an insert, select, ...

#92. SQLite CASE Expression: Simple CASE & Search CASE

In this tutorial, you will learn about the SQLite CASE expression to add the ... SELECT customerid, firstname, lastname, CASE country WHEN 'USA' THEN ...

#93. SQL Language--SELECT CASE WHEN THEN - Programmer ...

Case classification Case has two formats: 1. Simple Case function and 2.Case search function. Simple Case function: CASE sex WHEN '1' THEN ...

#94. 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 ...

#95. SQL CASE: Know and Avoid 3 Lesser-Known Hassles

-- aggregate function evaluated first and generated an error DECLARE @value INT = 0; SELECT CASE WHEN @value = 0 THEN 1 ELSE MAX(1/@value) END;.

#96. Examples to Implement SQL CASE Statement - eduCBA

CASE is an expression statement in Standard Query Language(SQL) used primarily for ... A CASE statement is generally used as a part of a SELECT clause, ...

#97. CASE and COALESCE | SQL Server System-Related Functions

Syntax for this flavor of CASE is as follows: ... SELECT job_desc, salary_level = CASE WHEN job_desc = 'New Hire - Job Not Specified' THEN ...

#98. CASE Statements in PostgreSQL - DataCamp

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