Example: GROUP BY Amount Spent By Each Customer -- calculate the total amount spent by each customerSELECTcustomer_id,SUM(amount)AStotalFROMOrdersGROUPBYcustomer_id; Run Code Here, the SQL command sums theamountafter grouping rows bycustomer_id. Example: SQL GROUP BY SQL GROUP BY Clause With ...
Now we have our sample data, let’s take a look at some examples. Examples of Aggregate Functions with SQL GROUP BY Let’s see some examples of aggregate functions with the SQL GROUP BY clause. Example 1 – COUNT Let’s say we want to find out theCOUNTof student grade records per year...
RANK() OVER (PARTITION BY dept_num ORDER BY salary) AS rank, //按照部门对部门内员工薪资排序 DENSE_RANK() OVER (PARTITION BY dept_num ORDER BY salary) AS dense_rank, PERCENT_RANK() OVER(PARTITION BY dept_num ORDER BY salary) AS percent_rank, NLITE(2) OVER(PARTITION BY dept_num ORDE...
SQL GROUP BY Examples The following SQL statement lists the number of customers in each country: ExampleGet your own SQL Server SELECTCOUNT(CustomerID), Country FROMCustomers GROUPBYCountry; Try it Yourself » The following SQL statement lists the number of customers in each country, sorted high...
GROUP BY Examples See Also Use the GROUP BY clause in a SELECT statement to group rows together that have the same value in one or more column, or the same computed value using expressions with any functions and operators except grouping functions. When you use a GROUP BY clause, you wil...
For simple GROUP BY, there is no limit on the number of expressions. For a GROUP BY clause that uses ROLLUP, CUBE, or GROUPING SETS, the maximum number of expressions is 32, and the maximum number of grouping sets that can be generated is 4096 (212). The following examples fail because...
是一种在数据库中使用的聚合函数,用于对数据进行分组并进行乘法运算。它通常与SQL语句中的GROUP BY子句一起使用,以便根据指定的列对数据进行分组,并对每个组中的值进行乘法运算。 该聚合函数的语法...
1. Introduction to MySQL GROUP BY clause 2. MySQL GROUP BY examples 2.1. Simple MySQL GROUP BY example 2.2. MySQL GROUP BY with aggregate functions 2.3. MySQL GROUP BY with expression example 3. MySQL GROUP BY with HAVING clause 4. The GROUP BY clause: MySQL vs. standard SQL ...
Using the table from the previous examples, this code runs a GROUP BY CUBE operation on Country and Region. SQL SELECTCountry, Region,SUM(Sales)ASTotalSalesFROMSalesGROUPBYCUBE(Country, Region); The query result has groups for unique values of (Country, Region), (NULL, Region), (Country, ...
Using the table from the previous examples, this code runs a GROUP BY CUBE operation on Country and Region. SQL SELECTCountry, Region,SUM(Sales)ASTotalSalesFROMSalesGROUPBYCUBE(Country, Region); The query result has groups for unique values of (Country, Region), (NULL, Region), (Country, ...