postgresql if select
SQL 中的CASE 表示式是一種通用的條件表示式，類似於其他程序語言中的if / else ... SELECT ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END; ... ,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' ... ,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 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' ... ,2013年9月26日 — Code snippet specifically answering your question: SELECT field1, field2, CASE WHEN field1>0 THEN field2/field1 ELSE 0 END AS field3 ... ,The PostgreSQL CASE expression is the same as IF/ELSE statement in other programming languages. It allows you to add if-else logic to the query to form a ... ,本節描述在PostgreSQL 裡可以用的SQL兼容的條件資料表達式。 ... SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' WHEN a=2 THEN ...
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 postgresql if select 相關參考資料
9.18. 條件表示式- PostgreSQL 正體中文使用手冊
SQL 中的CASE 表示式是一種通用的條件表示式，類似於其他程序語言中的if / else ... SELECT ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END; ... https://docs.postgresql.tw 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 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: 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: 9.0: 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: 9.1: 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: 9.5: 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 IF-THEN-ELSE statements in postgresql - Stack Overflow
2013年9月26日 — Code snippet specifically answering your question: SELECT field1, field2, CASE WHEN field1>0 THEN field2/field1 ELSE 0 END AS field3 ... https://stackoverflow.com PostgreSQL CASE - PostgreSQL Tutorial
The PostgreSQL CASE expression is the same as IF/ELSE statement in other programming languages. It allows you to add if-else logic to the query to form a ... https://www.postgresqltutorial 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。 ... SELECT * FROM test; a --- 1 2 3 SELECT a, CASE WHEN a=1 THEN 'one' WHEN a=2 THEN ... http://twpug.net |