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Asked: 2024-09-26T15:44:50+05:30 In:

how to write two where condition in sql

I hope someone can help me with this SQL query issue I’m having. I’m trying to filter results from my database, but I’m not quite sure how to incorporate multiple conditions effectively. Specifically, I want to use two WHERE conditions in my SQL statement.

For example, suppose I have a table named “Employees” with columns like “Department” and “Salary.” My goal is to get a list of employees not only from a specific department, say “Sales,” but also who have a salary above a certain threshold, like $50,000. I initially tried using a single WHERE clause, but I realized that I need to combine conditions to narrow down my results accurately.

I’m a bit confused about how to structure my query to reflect both conditions. Do I need to use “AND” between the conditions? What if I wanted to use “OR” instead—how would that change the results? I would really appreciate any examples or further clarification on this! Thanks in advance for your help!

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    2 Answers

    1. Okay, so like, if you wanna filter stuff in SQL, you can use the WHERE thingy. It’s kinda like saying, “give me that thing if it matches my rules.” So, if you have two conditions, you just gotta add AND or OR between them.

      For example:

      SELECT * FROM table_name WHERE condition1 AND condition2;

      Like, if you wanted to find all the people who are under 20 and live in New York, it’d look like:

      SELECT * FROM people WHERE age < 20 AND city = 'New York';

      But if you wanna find people who are either under 20 or live in New York, then you can switch it up with OR:

      SELECT * FROM people WHERE age < 20 OR city = 'New York';

      So, yeah! Just remember AND for both conditions need to be true and OR for either one can be true. Easy peasy!


    2. To write two WHERE conditions in SQL, you can use logical operators such as AND or OR, depending on the relationship you want to establish between the conditions. An AND operator will ensure that both conditions must be true for a record to be included in the result set, whereas an OR operator will include records where at least one of the conditions is true. For example, if you want to select rows from a table named `employees` where the `department` is ‘Sales’ and the `salary` is greater than 50000, you could write your query as follows:

      “`sql
      SELECT *
      FROM employees
      WHERE department = ‘Sales’ AND salary > 50000;
      “`
      Alternatively, if you want to select employees who are either in the ‘Sales’ department or have a salary greater than 50000, your query would look like this:

      “`sql
      SELECT *
      FROM employees
      WHERE department = ‘Sales’ OR salary > 50000;
      “`
      By combining these conditions effectively, you can refine your data retrieval to meet specific business requirements while leveraging SQL’s capabilities to handle complex queries efficiently.

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