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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.
case when usage in sqlCase 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.
sql case when usageThe 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.
How to use mysql case whenIn 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”.
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