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Suppose I have a SQL table "Celebrities" with two columns: "fname" and "lname":
fname | lname ---------+------- Bill | Clinton Bill | Gates George | Bush George | Clinton Barack | Obama I would like to write a query that returns the first and last name of each person in the table whose last name appears at least twice in the column "lname". How do I write this SQL query?
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To select data where a field has min value, you can use aggregate function min(). The syntax is as follows. SELECT *FROM yourTableName WHERE yourColumnName=(SELECT MIN(yourColumnName) FROM yourTableName);
To get a single row randomly, we can use the LIMIT Clause and set to only one row. ORDER BY clause in the query is used to order the row(s) randomly. It is exactly the same as MYSQL. Just replace RAND( ) with RANDOM( ).
What is LEAST() in SQL? The LEAST() function returns the smallest value from a list of arguments.
ROW_NUMBER (Window Function) ROW_NUMBER (Window Function) is a standard way of selecting the nth row of a table. It is supported by all the major databases like MySQL, SQL Server, Oracle, PostgreSQL, SQLite, etc.
SELECT fname, lname FROM Celebrities WHERE lname IN (SELECT lname FROM Celebrities GROUP BY lname HAVING COUNT (lname) >1) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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