在MySQL中,IN函数用于查询某个字段是否在给定的值列表中,而SUM函数用于计算某个字段的总和。结合使用这两个函数可以进行一些有趣的求和操作,本文将介绍如何使用IN函数和SUM函数进行求和,并提供一些实际的代码示例。 IN函数的使用 IN函数可以用于查询某个字段是否在给定的值列表中。其语法如下: SELECTcolumn_name(s)FR...
SELECTcolumn1,column2FROMtable_nameWHEREcolumn_nameIN(value1,value2,...); 1. 示例 假设我们希望查询所有金额为100和200的订单,可以使用如下语句: SELECT*FROMordersWHEREamountIN(100,200); 1. 输出: 3. 将SUM与IN语句结合使用 结合SUM函数与IN语句,我们能够统计符合特定条件的记录的总和。例如,若我们想计...
❮ Previous ❮ MySQL Functions Next ❯ ExampleGet your own SQL Server Return the sum of the "Quantity" field in the "OrderDetails" table: SELECT SUM(Quantity) AS TotalItemsOrdered FROM OrderDetails; Try it Yourself » Definition and UsageThe SUM() function calculates the sum of a ...
New to this forum and still very new to MySQL. Using SUM() function in a query. Result of query gets rounded up or rounded down to the nearest whole number, ex. 49.73 goes to 50.00, 73.02 goes to 73.00 I want to see the 10ths and 100ths. Is this what the function does by...
mysql 中sum (if())与case 先来一个简单的sum select sum(qty) as total_qty from inventory_product group by product_id 这样就会统计出所有product的qty. 但是很不幸,我们的系统里面居然有qty为负值。而我只想统计那些正值的qty,加上if function就可以了。 SQL为:...
mysql> select SUM ( sale_money ) FROM sale_report;ERROR 1630 (42000): FUNCTION test.SUM does not exist. Check the 'Function Name Parsing and Resolution' section in the Reference Manual去除空格以后：mysql> select SUM(sale_money) FROM sale_report;+---+| SUM(sale_money) |+--...
The function in the base class is not expected to be called. If it is called, it most likely means that some subclass is missing an override of val_json(). Parameters [in,out] result The resulting Json_wrapper. Returns false if successful, true on failure Reimplemented from Item....
Here we use the SUM() function and the GROUP BY clause, to return the Quantity for each OrderID in the OrderDetails table:Example SELECT OrderID, SUM(Quantity) AS [Total Quantity]FROM OrderDetails GROUP BY OrderID; Try it Yourself » ...
SELECTdate,SUM(caseresultwhen'win'then1else0end)ASwin,SUM(caseresultwhen'lose'then1else0end)ASloseFROMinfoGROUPBYdateORDERBYdate; 测试完了,删除测试表: DROPTABLEinfo; 参考资料: http://www.yiibai.com/mysql/case-function.html http://www.cnblogs.com/yazdao/archive/2009/12/09/1620482.html ...
I am using mysql 5.5.11, when i execute the script below INSERT INTO payments(created, Amount, user, Remarks, orderid, paymethod) VALUES('2016-09-03', 0.0, 'admin', '', 4, 'Cash'); I get error SQL Error: FUNCTION mydb.SUM does not exist. Check the 'Function Name Parsing and...