postgresql select if else
If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... ,If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... ,If the ELSE clause is omitted and no condition matches, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... ,If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... ,If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... ,If the ELSE clause is omitted and no condition matches, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... ,If the ELSE clause is omitted and no condition matches, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... , As stated in PostgreSQL docs here: ... SELECT field1, field2, CASE WHEN field1>0 THEN field2/field1 ELSE 0 END AS field3 FROM test.,本節描述在PostgreSQL 裡可以用的SQL兼容的條件資料表達式。 ... 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。 ... SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' WHEN a=2 ... ,The PostgreSQL CASE expression is the same as IF/ELSE statement in other ... SELECT. SUM (. CASE. WHEN rental_rate = 0.99 THEN. 1. ELSE. 0. END. ) ...
| 相關軟體 PostgreSQL (64-bit) 資訊 | |
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 postgresql select if else 相關參考資料
Documentation: 9.1: Conditional Expressions - PostgreSQL
If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... https://www.postgresql.org Documentation: 8.4: Conditional Expressions - PostgreSQL
If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... https://www.postgresql.org Documentation: 8.2: Conditional Expressions - PostgreSQL
If the ELSE clause is omitted and no condition matches, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... https://www.postgresql.org Documentation: 9.4: Conditional Expressions - PostgreSQL
If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... https://www.postgresql.org Documentation: 9.2: Conditional Expressions - PostgreSQL
If the ELSE clause is omitted and no condition is true, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... https://www.postgresql.org Documentation: 8.3: Conditional Expressions - PostgreSQL
If the ELSE clause is omitted and no condition matches, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... https://www.postgresql.org Documentation: 7.4: Conditional Expressions - PostgreSQL
If the ELSE clause is omitted and no condition matches, the result is null. An example: SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' ... https://www.postgresql.org IF-THEN-ELSE statements in postgresql - Stack Overflow
As stated in PostgreSQL docs here: ... SELECT field1, field2, CASE WHEN field1>0 THEN field2/field1 ELSE 0 END AS field3 FROM test. 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。 ... 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。 ... SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' WHEN a=2 ... http://twpug.net PostgreSQL CASE - PostgreSQL Tutorial
The PostgreSQL CASE expression is the same as IF/ELSE statement in other ... SELECT. SUM (. CASE. WHEN rental_rate = 0.99 THEN. 1. ELSE. 0. END. ) ... http://www.postgresqltutorial. |