postgresql coalesce 0
You can use COALESCE in conjunction with NULLIF for a short, efficient solution: COALESCE( NULLIF(yourField,'') , '0' ). The NULLIF function ..., You can combine NULLIF with COALESCE : SELECT company, COALESCE(NULLIF(turnover, 0), revenue) AS revenue FROM ...,The COALESCE function returns the first of its arguments that is not null. Null is returned only if all arguments are null. It is often used to substitute a default value ... , You can use NULLIF function e.g. something/NULLIF(column_name,0) ... greatest( count(column_name), 1 ) -- NULL and 0 are valid argument ...,SELECT ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END; ... The COALESCE function returns the first of its arguments that is not null. Null is ... ,SELECT ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END; ... The COALESCE function returns the first of its arguments that is not null. Null is ... ,在本教程中，您将学习返回第一个非null参数的PostgreSQL COALESCE函数。 ... SELECT product, (price - COALESCE(discount,0)) AS net_price FROM items;. ,本節描述在PostgreSQL 裡可以用的SQL兼容的條件資料表達式。 ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END;. 9.13.2. COALESCE. COALESCE(value[, ...]) COALESCE 返回它的第一個非NULL 的參數的值。 它常用於在為顯示 ... ,1. 2. 3. 4. 5. 6. 7. 8. SELECT. NULLIF (1, 1); -- return NULL. SELECT. NULLIF (1, 0); -- return 1. SELECT. NULLIF ('A', 'B'); -- return A ... ,In this tutorial, you will learn about the PostgreSQL COALESCE function that ... In the query above we say if the discount is null then use zero (0) otherwise use ...
| 相關軟體 PostgreSQL (64-bit) 資訊 | |
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 postgresql coalesce 0 相關參考資料
Using COALESCE to handle NULL values in PostgreSQL - Stack Overflow
You can use COALESCE in conjunction with NULLIF for a short, efficient solution: COALESCE( NULLIF(yourField,'') , '0' ). The NULLIF function ... https://stackoverflow.com Coalesce for zero instead of null - Stack Overflow
You can combine NULLIF with COALESCE : SELECT company, COALESCE(NULLIF(turnover, 0), revenue) AS revenue FROM ... https://stackoverflow.com postgresql return 0 if returned value is null - Stack Overflow
The COALESCE function returns the first of its arguments that is not null. Null is returned only if all arguments are null. It is often used to substitute a default value ... https://stackoverflow.com Avoid division by zero in PostgreSQL - Stack Overflow
You can use NULLIF function e.g. something/NULLIF(column_name,0) ... greatest( count(column_name), 1 ) -- NULL and 0 are valid argument ... https://stackoverflow.com PostgreSQL: Documentation: 9.2: Conditional Expressions
SELECT ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END; ... The COALESCE function returns the first of its arguments that is not null. Null is ... https://www.postgresql.org PostgreSQL: Documentation: 11: 9.17. Conditional Expressions
SELECT ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END; ... The COALESCE function returns the first of its arguments that is not null. Null is ... https://www.postgresql.org PostgreSQL COALESCE-PostgreSQL轻松学-SJK66.COM
在本教程中，您将学习返回第一个非null参数的PostgreSQL COALESCE函数。 ... SELECT product, (price - COALESCE(discount,0)) AS net_price FROM items;. https://pg.sjk66.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。 ... WHERE CASE WHEN x <> 0 THEN y/x > 1.5 ELSE false END;. 9.13.2. COALESCE. COALESCE(value[, ...]) COALESCE 返回它的第一個非NULL 的參數的值。 它常用於在為顯示 ... http://twpug.net PostgreSQL NULLIF function - PostgreSQL Tutorial
1. 2. 3. 4. 5. 6. 7. 8. SELECT. NULLIF (1, 1); -- return NULL. SELECT. NULLIF (1, 0); -- return 1. SELECT. NULLIF ('A', 'B'); -- return A ... http://www.postgresqltutorial. PostgreSQL COALESCE - PostgreSQL Tutorial
In this tutorial, you will learn about the PostgreSQL COALESCE function that ... In the query above we say if the discount is null then use zero (0) otherwise use ... http://www.postgresqltutorial. |