Usage of division operation in Oracle SQL

"Usage of division operation in Oracle SQL"

In Oracle SQL, division operation is one of the common mathematical operations. During data query and processing, division operations can help us calculate the ratio between fields or derive the logical relationship between specific values. This article will introduce the usage of division operation in Oracle SQL and provide specific code examples.

1. Two ways of division operation in Oracle SQL

In Oracle SQL, division operation can be performed in two different ways, namely direct division and division function.

1. Direct division: Use the "/" symbol directly to perform division operations, and divide two numbers to get the result.

For example, calculate the value of field a divided by field b:

SELECT a / b AS result
FROM table_name;

2. Division function: Oracle SQL provides two division functions, DIV and /, which can implement integers division operation.

• DIV function: Returns the integer part of the division operation, ignoring the decimal part.

For example, calculate the integer part of field a divided by field b:

SELECT a DIV b AS result
FROM table_name;

• /Function: Returns the exact result of the division operation, including the decimal part.

For example, calculate the exact result of dividing field a by field b:

SELECT a / b AS result
FROM table_name;

2. Example of division operation in Oracle SQL

Suppose there is a file named "students ” table, including students’ student numbers (id), names (name), math scores (math), and English scores (english). We will use this table as an example to demonstrate the use of division operations in Oracle SQL.

1. Direct division example:

   SELECT name, math, english, math / english AS math_english_ratio
   FROM students;

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Run the above SQL statement and you will get the ratio of each student's math score and English score.

2. Example of division function:

   SELECT name, math, english, math DIV english AS math_english_integer_ratio,
   math / english AS math_english_exact_ratio
   FROM students;

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   Run the above SQL statement and you will get the integer ratio sum of each student's math score and English score Exact ratio.

   Through the above examples, we can see how to use division operations to perform numerical calculations in Oracle SQL and get the results we need. In actual work, division operation is a very common operation method that can help us better analyze and process data.

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