Can you sum a case statement in SQL?

How do I SUM a query in SQL?

Example – With Single Expression

SELECT SUM(salary) AS “Total Salary” FROM employees WHERE salary > 25000; In this SQL SUM Function example, we’ve aliased the SUM(salary) expression as “Total Salary”. As a result, “Total Salary” will display as the field name when the result set is returned.

Can we add case statement in where clause in SQL?


The CASE statement returns the value based on condition. We can use a case statement in Where, Order by and Group by clause.

How do I SUM a row of data in SQL?

The aggregate function SUM is ideal for computing the sum of a column’s values. This function is used in a SELECT statement and takes the name of the column whose values you want to sum. If you do not specify any other columns in the SELECT statement, then the sum will be calculated for all records in the table.

Can you sum in a case statement?

The SUM() function will sum all those rows that have the assigned value equal to 1. … Using a CASE WHEN expression to assign values 0 or 1 to the table rows is just a little trick to make SUM() return the number of rows just like the COUNT() function would.

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Can you do Sumif in SQL?

Excels SUMIF in SQL

The column is explicitly used in the > that is put into the case expression. The case expression accepts different values in the when and then branches. This allows you to do the same thing as the third argument of the sumif function.

What is sum in SQL?

SQL SUM() function

Return the SUM of unique values. expression. Expression made up of a single constant, variable, scalar function, or column name. The expression is an expression of the exact numeric or approximate numeric data type category, except for the bit data type.

How do I COUNT the number of rows in SQL?

Use the COUNT aggregate function to count the number of rows in a table. This function takes the name of the column as its argument (e.g., id ) and returns the number of rows for this particular column in the table (e.g., 5).

How do you sum distinct values in SQL?

SQL Server SUM

  1. ALL instructs the SUM() function to return the sum of all values including duplicates. ALL is used by default.
  2. DISTINCT instructs the SUM() function to calculate the sum of the only distinct values.
  3. expression is any valid expression that returns an exact or approximate numeric value.

How many tables can be join in SQL query?

Theoretically, there is no upper limit on the number of tables that can be joined using a SELECT statement. (One join condition always combines two tables!) However, the Database Engine has an implementation restriction: the maximum number of tables that can be joined in a SELECT statement is 64.

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How do I sum a column with the same ID in SQL?

To sum rows with same ID, use the GROUP BY HAVING clause.

How do I sum a column in MySQL?


  1. If you use the SUM() function in a SELECT statement that returns no row, the SUM() function returns NULL , not zero.
  2. The DISTINCT option instructs the SUM() function to calculate the sum of only distinct values in a set.
  3. The SUM() function ignores the NULL values in the calculation.

How can calculate total marks in SQL query?


COUNT, SUM, and AVG are aggregate functions. COUNT returns a count of the number of data values. SUM returns the sum of the data values. AVG returns the average of the data values.