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28 lut 2012 · You can either put another case or use decode (as @madhu suggested): select case. when value in (1000) then null. when user in ('ABC') then user. when area in ('DENVER') then. case when value = 2000 then 'Service1'. when value = 3000 then 'Service2'. end.
7 gru 2023 · If you want to do if-else-then logic in select, where or anywhere else in a statement, you need a case expression. This is a series of when clauses that the database runs in order: For example, if you want to map exam correct percentages to grade letters according to these rules:
Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. The CASE expression evaluates a list of conditions and returns one of the multiple possible results. You can use a CASE expression in any statement or clause that accepts a valid expression.
26 maj 2010 · No, the CASE structure in SQL is to return a value, not for program flow. You need to break it into IF statements.
The syntax for the CASE statement in Oracle/PLSQL is: CASE [ expression ] WHEN condition_1 THEN result_1 WHEN condition_2 THEN result_2 ... WHEN condition_n THEN result_n ELSE result END Parameters or Arguments expression Optional. It is the value that you are comparing to the list of conditions.
declare res_type char(1); res_value varchar2(10); begin res_type := 'G'; res_value := 'A'; for rws in ( select grade, outcome, count(*) c from exam_result_outcomes where case res_type when 'G' then grade when 'O' then outcome end = res_value group by grade, outcome ) loop dbms_output.put_line ( rws.grade || ' ' || rws.outcome || ' ' || rws.c ...
2 cze 2023 · SQL CASE Statement Syntax. The syntax of the SQL CASE expression is: CASE [expression] WHEN condition_1 THEN result_1 WHEN condition_2 THEN result_2 ... WHEN condition_n THEN result_n ELSE result END case_name. The CASE statement can be written in a few ways, so let’s take a look at these parameters. Parameters of the CASE Statement
