Oracle case when multiple values

The Oracle 8i release introduced the CASE expression. Moreover, using the CASE function, multiple conditions provided in separate SQL queries can. How to return multiple values for THEN clause in an. I am using the case statement in the cursor WHERE.

Even in Oracle (and in fact in the SQL standard), CASE is an expression that returns a single value. The searched CASE expression can be more complicate involving multiple columns in the comparisons.

Each comparison is tested in turn and the associated value returned if a match is found. Once again, there is an optional ELSE clause to deal with situations where a match is not found. Browse other questions tagged sql oracle case or ask your own. The CASE expression evaluates a list of conditions and returns one of the multiple possible. Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure.

Can You Use An Oracle CASE Statement In WHERE Clause? Yes, you can use an Oracle CASE in a WHERE. Either add another WHEN to handle the other values or use your WHERE clause to only return Day Start values if that is your goal.

I used case when but I cannot seem to return more than value.

Load the values to an XML document and extract out. So in another words, there is no way to shorten the code (like in SQL), you have to spell out each variable, even though they all have the end result of Yes? Both formats support an optional ELSE argument.

But in my defense, in all examples the case expression itself is actually returning a single column value. You are then processing this value , or in some cases completely ignoring this, to get the result. The case statement itself is not allowing you to pass multiple columns back. IS NOT NULL THEN NULL WHEN cert. True, but I generally try to steer clear of NVL when it comes to special values.

You never know when that special value becomes a real one and your app silently breaks. We have a set of reports that run, and overnight they are. If you, say, want to return two columns, each based on some condition, then you need to use two CASE expressions. Return multiple rows from matching on multiple CASE matches ? If I try to do this with CASE , only the first match will be counted. Oracle SQL allows you to add Boolean logic and branching using the decode and CASE clauses.

CASE statement uses selector rather than a Boolean expression to choose the sequence. You cannot evaluate multiple expressions in a Simple case expression, which is what you were attempting to do. Multiple rows are inserted into a table using the INSERT ALL statement and by using the inserting the of the select query.

The following sections present a variety of examples illustrating the uses of conditional logic in SQL statements.

Although we recommend that you use the CASE expression rather than the DECODE function, where feasible we provide both DECODE and CASE versions of each example to help illustrate the differences between the two approaches. SQL is a language that is generic to all database platforms. Using IN (1854) should work anywhere. CASE , DECODE, or COALESCE.

I need to evaluate columns based on a condition. So, which one should you use? CASE is better than DECODE because it is easier to rea and can handle more complicated logic. I would suggest using CASE in almost every case.

As far as performance goes, there is minimal difference between CASE and DECODE, so it should not be a factor in your decisions. There is a little help available when you select that function to tell you about how to use it. Case Switch and Case IF. Booleans are values , there’s no need to swaddle them in a conditional before you can look at them.

By using the Oracle UPDATE statement, you can update one or multiple rows in a table. CASE WHEN length BETWEEN 1AND 1THEN ELSE END. In this post we are going to look at how we can update multiple columns at the. Q- Some of my date fields are null.

If you specify match_parameter values that conflict, the REGEXP_LIKE condition will use the last value to break the conflict. If the match_parameter is omitte the REGEXP_LIKE condition will use the case -sensitivity as determined by the NLS_SORT parameter. See also the Oracle LIKE condition.