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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.
27 wrz 2013 · I need to run a CASE expression on a number of columns, the columns are Boolean, so if it's 0 I need to populate the column with the column name and if it's 1, I ignore the column/value. I then need to concatenate all these columns into one. Is it possible to do this in Oracle SQL? I've tried this:
7 gru 2023 · A case expression returns a single value. In PL/SQL you can write a case statement to run one or more actions. The differences between case expressions and statements are: You complete them with end case (instead of just end) Each then/else clause contains a statement, rather than returning a value
The simple CASE statement evaluates a single expression and compares it to several potential values. The searched CASE statement evaluates multiple Boolean expressions and chooses the first one whose value is TRUE.
Co to jest oświadczenie CASE? Instrukcja CASE jest podobna do instrukcji IF-THEN-ELSIF, która wybiera jedną alternatywę na podstawie warunku z dostępnych opcji. Instrukcja CASE używa „selektora” zamiast wyrażenia boolowskiego do wybrania sekwencji.
The CASE statement chooses from a sequence of conditions, and executes a corresponding statement. The CASE statement evaluates a single expression and compares it against several potential values, or evaluates multiple Boolean expressions and chooses the first one that is TRUE. Syntax. searched_case_statement ::=
A simple CASE statement evaluates a single expression and compares the result with some values. The simple CASE statement has the following structure: 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)
