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SELECT t.contactid FROM YOUR_TABLE t WHERE flag IN ('Volunteer', 'Uploaded') GROUP BY t.contactid HAVING COUNT(DISTINCT t.flag) = 2 The key thing is that the counting of t.flag needs to equal the number of arguments in the IN clause.
To filter data by multiple conditions in a WHERE clause, use the AND operator to connect the conditions. Here’s what this looks like for two conditions: WHERE condition1 AND condition2. In our example, condition1 is dept = 'Finance' and condition2 is salary > 4000.
12 Οκτ 2024 · Using multiple subqueries referencing the same table can make the overall query long and inefficient. Learn how to avoid this.
In SQL Server, you can use multiple WHERE conditions to filter the results of a SELECT query based on specific criteria. This allows you to retrieve data that meets multiple requirements simultaneously.
I want to grab a value from a table into two different columns for different values from the same table. Use this query as an example (notice how the select is on the same table aliased as 2 different tables): SELECT a.myVal, b.myVal. FROM MyTable a, MyTable b. WHERE.
The SQL WHERE Clause. The WHERE clause is used to filter records. It is used to extract only those records that fulfill a specified condition. Example. Select all customers from Mexico: SELECT * FROM Customers. WHERE Country='Mexico'; Try it Yourself » Syntax. SELECT column1, column2, ... FROM table_name. WHERE condition;
SELECT DISTINCT user_id FROM table WHERE ancestry IN ('England', '...', '...') GROUP BY user_id HAVING count(*) = <number of conditions that has to be satisfied> etc. If you need to take all user_ids that satisfies at least one condition, then you can do. SELECT DISTINCT user_id from table where ancestry IN ('England', 'France', ... , '...')
