WebThe CASE statement is like a series of IF statements, only using the key word WHEN. A CASE statement is evaluated from top to bottom. If a condition is true, then … WebJan 26, 2024 · The CASE statement has been around the Oracle RDBMS for quite a while. PL/SQL can two versions of the CASE statement (I call these Format 1 and Format 2) where Format 1 is very similar to the SQL version of the CASE statement. CASE is flexible, tunable, fast, and compatible with CASE found in other computer languages.
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oracle - how can I use a CASE with an alias defined befor case ...
WebThe WILDCARDS with LIKE operator allows us to perform character pattern matching. There are two WILDCARDS in Oracle which are: %: It represents a sequence of any number of characters including zero. _: It represents any single character but only at the specified position. WILDCARDS with LIKE operator must be used in WHERE clause WebFeb 9, 2007 · Is it possible to use a SELECT statement within case For ex, SELECT CASE WHEN A1.COL1=B1.COL1 THEN SELECT A1.COL1, B1.COL1 FROM A1, B1 WHERE A1.COL1=B1.COL1 ELSE SELECT A1.COL1, C1.COL1 FROM A1,C1 WHERE A1.COL1=C1.COL1 END FROM A1,B1,C1; That is if A1.col1 matches B1.col1 then select … WebThe CASE statements supported by PL/SQL are very similar to the CASE expressions. Notice the statement is finished with the END CASE keywords rather than just the END keyword. The PL/SQL CASE statements are essentially an alternative to IF .. THEN .. ELSIF statements. They are control structures that conditionally call blocks of code. data indexing in sql