CASE With Multiple Conditions It is also possible to stack multiple conditions inside a singleCASEclause. Syntax SELECTcolumn1, column2, ...CASEWHENcondition1THENresult1WHENcondition2THENresult2-- Add more WHEN
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 st...
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...
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 ...】 14.1.3 ALTER LOGFILE GROUP Syntax logfile_group file_namesizeengine_name Al...
Syntax SQLSyntax ❮ PreviousNext ❯ SQL Statements Most of the actions you need to perform on a database are done with SQL statements. SQL statements consist of keywords that are easy to understand. The following SQL statement returns all records from a table named "Customers":...
...UPDATE salary SET sex = IF(sex = 'm', 'f', 'm') 也可以利用条件语句,在搜索的时候,直接进行数据转换 select *,(CASE WHEN sex='1'...参考资料: 1、Mysql if case总结 2、Leetcode swap salary 3、select case when if 的一些用法 4、IF Syntax...
第52 章 SQL Statement Syntax2018-01-04 1007 版权 简介: Structured Query Language 目录 52.1. DISTINCT 52.2. group by 52.3. HAVING 52.4. REGEXP 52.5. IN / NOT IN 52.6. ALL / Any 52.7. exists, not exists 52.8. UNION 52.8.1. UNION ALL 52.9. OUTFILE/LOAD DATA INFILE ...
SQL DELECT Statement Delete All Records SQL TOP, LIMIT or ROWNUM Clause TOP select TOP 3 * from costumers; LIMIT ROWNUM The three syntaxes above are equivalent. TOP PERCENT With a WHERE clause SQL MIN() AND MAX() SQL COUNT(),AVG() and SUM() Functions ...
Druid SQL Parser分三个模块:Parser,AST,Visitor。parser是将输入文本转换为ast(抽象语法树),parser有包括两个部分,Parser和Lexer,其中Lexer实现词法分析,Parser实现语法分析,AST是Abstract Syntax Tree的缩写,也就是抽象语法树。Visitor是遍历AST的手段,是处理AST最方便的模式。
This statement is used to display result_expression according to the joined results of input_expression and when_expression.CASE: Subquery is supported in basic CASE stat