If statement in select (ORACLE)
Use the CASE
expression for implementing IF logic
in your SELECT
statement:
Update your_condition
, 'ResultWhenTrue'
, 'ResultWhenFalse'
, new_result_column
, and your_table
to match your dataset. The above code evaluates each row against your condition and reflects the output in new_result_column
.
Column Equality & Truthiness–Reality Is Relative 🌌
If you're interested in column comparisons, check out:
And just a friendly neighborhood reminder, in Oracle world null ≠ null
🥷. If you're about peace, love and equality then NVL
or COALESCE
are your best pals.
Better Simple than Sorry–No Time for Drama! 🪂
Nested case statements? They might display your SQL prowess, but also increase the potential for headaches. Stick to plain and simple structures when you can avoid complexity.
When Syntax Spells Trouble–Beware of the Quotes! 😈
Oracle isn't very forgiving when it comes to syntax. Confuse your single quotes ('
) with double quotes ("
) and you're in a soup. Also, incorrect or inconsistent column references can lead to unexpected output.
Nulls are Never Alone–Except When They Are 🦠
Null values in Oracle are like teenagers. They simply refuse to be equal! A CASE
statement considering nulls might not behave as you'd expect. Leverage Oracle's NVL
or COALESCE
functions to handle null columns.
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