Home > Topic List > case when usage sql

case when usage sql

The usage of case when is to perform different operations according to different conditions in SQL queries. This topic provides you with articles, downloads, and course content related to case when for free download and experience.

The difference between fprintf and printf How to reinstall the computer system What is the difference between mysql and mssql pscs5 installation serial number

time：2023-07-17 15:45:31

case when usage in sql Case when in SQL is used to perform different operations based on different conditions in SQL queries. You can make judgments based on any conditions and perform corresponding operations based on the results of the conditions. The working principle of the CASE WHEN statement is to judge the conditions one by one from top to bottom. Once a condition is met, the corresponding operation will be performed, and only the first one that satisfies the condition will be executed. Conditional operations.

case when

6825

825
sql case when usage The usage of sql case when allows different operations to be performed based on different conditions. Whether it's a simple classification or complex nested conditions, the CASE WHEN statement provides a flexible and readable way to handle different situations. By mastering and using the CASE WHEN statement proficiently, we can better process and analyze data.

case when

2249

946
Detailed explanation of usage of sql statement case when The usage of [case when] in SQL is: 1. Use [case field name when field value then value 1 else value 2 end] to judge the field value; 2. Use [case when condition then value 1 else value 2 end] to judge Field value.

sql

53530

778
What is the usage of mysql case when The usage of mysql case when is: 1. Used as a simple search, the syntax is [CASE [col_name] WHEN [value1]]; 2. Used as a search function, the syntax is [CASE WHEN [expr] THEN [result1]].

case when mysql

5704

570
How to use mysql case when In mysql, "case when" is used to calculate a condition list and return one of multiple possible result expressions; "case when" has two syntax formats: 1. Simple function "CASE[col_name]WHEN[value1]THEN[result1 ]…ELSE[default]END”; 2. Search function “CASE WHEN[expr]THEN[result1]…ELSE[default]END”.

mysql

13246

936

Related courses More >

AdvancedTens of millions of data concurrency solutions (theory + practical): 45740 times of learning
Collection

IntermediateIssue 18_PHP Programming: 15493 times of learning
Collection

IntermediateLive classroom recording of the second full-stack development training class (ThinkPHP5.1): 21356 times of learning
Collection

IntermediateBecome a PHP Architect - Homemade PHP Framework: 5077 times of learning
Collection