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@ -14,10 +14,10 @@ For example, consider the following `ORDER` table: |
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``` |
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``` |
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| OrderID | Company | Quantity | |
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| OrderID | Company | Quantity | |
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|-------------|-----------|----------| |
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|------------|---------|----------| |
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| 1 | A | 30 | |
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| 1 | A | 30 | |
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| 2 | B | 15 | |
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| 2 | B | 15 | |
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| 3 | A | 20 | |
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| 3 | A | 20 | |
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``` |
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``` |
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If you want to find the total quantity, you can use `SUM()`: |
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If you want to find the total quantity, you can use `SUM()`: |
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@ -30,8 +30,8 @@ Output will be: |
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``` |
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``` |
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| TotalQuantity | |
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| TotalQuantity | |
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|----------------| |
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|---------------| |
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| 65 | |
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| 65 | |
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``` |
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``` |
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**Note:** The `SUM()` function skips NULL values. |
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**Note:** The `SUM()` function skips NULL values. |
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@ -55,4 +55,4 @@ This will give us the sum of `Quantity` for each `Company` in the `Order` table. |
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| B | 15 | |
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| B | 15 | |
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``` |
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``` |
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Notably, in all databases, including MySQL, PostgreSQL, and SQLite, the `SUM()` function operates the same way. |
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Notably, in all databases, including MySQL, PostgreSQL, and SQLite, the `SUM()` function operates the same way. |
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