How to use sumif in sql

The SUMIF function in SQL is used to sum values ​​under specific conditions. The syntax is: specify the conditions and data range to be applied. Use the SUMIF function in SQL queries, noting conditions, ranges, and summing ranges. Run a query to get the sum of the numeric values ​​of cells that meet a condition.

Usage of SUMIF function in SQL

The SUMIF function in SQL is used to log values ​​under specific conditions Perform summation. The syntax is:

<code class="sql">SUMIF(条件, 范围, 求和范围)</code>

Where:

• Condition: The condition to be applied to the specified range of data.
• Range: The range of cells to which the condition is to be applied.
• Summing range: The numerical range to sum the cells that meet the conditions.

How to use the SUMIF function

To use the SUMIF function, follow these steps:

1. Determine the conditions that require the sum and scope.
2. Use the SUMIF function in SQL queries to specify conditions, ranges, and summing ranges.
3. Run the query to get the sum of the values ​​of cells that meet the condition.

Example

The following example demonstrates how to calculate the sum of all sales in cities that meet the criteria:

<code class="sql">SELECT SUMIF(城市 = '纽约', 销售范围, 销售金额范围);</code>

This query will calculate the sum of all sales in cities that meet the criteria: The sum of all sales for the following conditions:

• City equals "New York"
• Sales range belongs to sales range
• Sales amount range belongs to sales amount range

Other Notes

• The SUMIF function can be used with multiple conditions, using the AND or OR operator to connect the conditions.
• The SUMIF function returns 0 if the condition or range is empty.
• The SUMIF function is case-sensitive.

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