postgresql if else if else
IF-THEN statements are the simplest form of IF. The statements between THEN and END IF will be executed if the condition is true. Otherwise, they are skipped. ,IF-THEN statements are the simplest form of IF. The statements between THEN and END IF will be executed if the condition is true. Otherwise, they are skipped.
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 postgresql if else if else 相關參考資料
COALESCE() function - PostgreSQL
CASE. The SQL CASE expression is a generic conditional expression, similar to if/else statements in other programming languages: CASE WHEN condition ... https://www.postgresql.org Documentation: 7.2: Control Structures - PostgreSQL
IF-THEN statements are the simplest form of IF. The statements between THEN and END IF will be executed if the condition is true. Otherwise, they are skipped. https://www.postgresql.org Documentation: 8.0: Control Structures - PostgreSQL
IF-THEN statements are the simplest form of IF. The statements between THEN and END IF will be executed if the condition is true. Otherwise, they are skipped. https://www.postgresql.org Documentation: 8.4: Conditional Expressions - PostgreSQL
CASE. The SQL CASE expression is a generic conditional expression, similar to if/else statements in other programming languages: CASE WHEN condition ... https://www.postgresql.org Documentation: 9.0: Control Structures - PostgreSQL
IF-THEN-ELSE statements add to IF-THEN by letting you specify an alternative set of statements that should be executed if the condition is not true. (Note this ... https://www.postgresql.org Documentation: 9.1: Control Structures - PostgreSQL
IF-THEN-ELSE statements add to IF-THEN by letting you specify an alternative set of statements that should be executed if the condition is not true. (Note this ... https://www.postgresql.org Documentation: 9.4: Control Structures - PostgreSQL
IF-THEN statements are the simplest form of IF. The statements between THEN and END IF will be executed if the condition is true. Otherwise, they are skipped. https://www.postgresql.org PLpgSQL IF Statement - PostgreSQL Tutorial
PL/pgSQL IF THEN ELSIF THEN ELSE statement else-statement; ... For example, if the condition-1 , condition-2 , etc., is true then the corresponding statement: if-statement , elseif-statement-2 , etc.,... http://www.postgresqltutorial. PostgreSQL IF statement - Stack Overflow
Try: DO $do$ BEGIN IF EXISTS (SELECT FROM orders) THEN DELETE FROM orders; ELSE INSERT INTO orders VALUES (1,2,3); END IF; ... https://stackoverflow.com 條件資料表達式
本節描述在PostgreSQL 裡可以用的SQL兼容的條件資料表達式。 ... SQL CASE 資料表達式是一種通用的條件資料表達式，類似於其它語言中的if/else 語句。 ... 如果沒有WHEN condition 為真，那麼 case 資料表達式的結果就是在ELSE 子句裡的值。 http://twpug.net |