In this article, we’ll explain what a CASE statement is, why it’s essential and explore various use cases to help you harness its potential. Let’s get started! What is a CASE Statement? The Case Statement in SQL is a conditional expression that introduces a decision making logic into ...
We can add as manyWHEN ... THENconditions as required in theCASEstatement. For example, -- multiple CASE conditions in SQLSELECTcustomer_id, first_name,CASEWHENcountry ='USA'THEN'United States of America'WHENcountry ='UK'THEN'United Kingdom'ENDAScountry_nameFROMCustomers; Run Code Here, the...
SQL: CASE Statement 1.CASE 写法如下: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 WHEN conditionN THEN resultN ELSE result END; 解释:1)先匹配第一条,不匹配的话继续第二条,如此循环,
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 statement in detail: 1) selector The selector is an...
...= "" IF ELSE 流程控制语句 在mysql存储过程中的用法: IF search_condition THEN statement_list [ELSEIF search_condition...[ELSE statement_list] END IF IF作为一条语句,在END IF后需要加上分号“;”以表示语句结束,其他语句如CASE、LOOP等也是相同的。...UPDATE salary SET sex = IF(sex = 'm'...
SQL Server Reporting Services, Power View Index .5in is not a valid unit designator. Valid unit designators are in, mm, cm, pt, pc. 'No such host is known' error when configuring Reporting database 'Oracle' data extension not registered 'Return' statement in a Function,Get,or Operator ...
When you piece all three of those columns for oneSELECT STATEMENTand throw in the rest of the necessary pieces to build a SQL query, it all take shape below. Then after adding aPIVOT DATAstep into the Data Pipeline, we’ll get a table properly arranged in the proper format to set up ...
Access Code - DELETE Statement with DISTINCTROW and T-SQL Access Now() vs. T-SQL GETDATE() ? ADD and SUBTRACT depending on the condition is CASE STATEMENT ADD COLUMN to variable table? Add prefix in data column Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a lar...
, IN v_str varchar(30) ) BEGIN CASE n_str WHEN n_str = 'profileStatus' THEN UPDATE tbl_contact SET status = 'A' WHERE id = id; -- The above statement updates the entire table instead of the right row WHEN n_str = 'phoneNumberMobile' THEN ...
, IN v_str varchar(30) ) BEGIN CASE n_str WHEN n_str = 'profileStatus' THEN UPDATE tbl_contact SET status = 'A' WHERE id = id; -- The above statement updates the entire table instead of the right row WHEN n_str = 'phoneNumberMobile' THEN ...