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How do I get the maximum of multiple columns in SQL?

Kobe Glover

How do I get the maximum of multiple columns in SQL?

Find MAX value from multiple columns in a SQL Server table

  1. Solution 1. The first solution is the following:
  2. Solution 2. We can accomplish this task by using UNPIVOT:
  3. Solution 3. This task can be solved by using UNION:
  4. Solution 4. And the fourth solution also uses a UNION:
  5. Performance Comparison.
  6. Conclusion.

How do I get the highest value in 3 columns in SQL?

To get the maximum value from three different columns, use the GREATEST() function. Insert some records in the table using insert command. Display all records from the table using select statement.

How do I get the max of two values in SQL?

SELECT MAX (column_name) FROM table_name WHERE column_name NOT IN (SELECT Max (column_name) FROM table_name); First we selected the max from that column in the table then we searched for the max value again in that column with excluding the max value which has already been found, so it results in the 2nd maximum value.

How do you find the maximum value of multiple tables?

select id from T1 where price in( select max(price) from( select max(price) as price from T1 union select max(price) as price from T2 union select max(price) as price from T3 ) temp ) union select id from T2 where price in( select max(price) from( select max(price) as price from T1 union select max(price) as price from …

How do you find the minimum of multiple columns in SQL?

you can find a row-wise minimum like this: SELECT C1, C2, C3, ( SELECT MIN(C) FROM (VALUES (C1), (C2), (C3) AS v (C) ) AS MinC FROM T ; Basically you are arranging the values of C1 , C2 , C3 as a column and are applying a normal (column-wise) aggregate function to it to find the minimum.

Can I use Max in WHERE clause?

MAX() function with Having The SQL HAVING CLAUSE is reserved for aggregate function. The usage of WHERE clause along with SQL MAX() have also described in this page. The SQL IN OPERATOR which checks a value within a set of values and retrieve the rows from the table can also be used with MAX function.

How do I select a minimum row in SQL?

To find the minimum value of a column, use the MIN() aggregate function; it takes as its argument the name of the column for which you want to find the minimum value. If you have not specified any other columns in the SELECT clause, the minimum will be calculated for all records in the table.

What does the greatest function do?

The Oracle GREATEST function returns the “greatest” or largest value in a set of values that you provide to it. The Oracle LEAST function returns the “least” or smallest value in a set of values that you provide to it, and it’s the opposite of the GREATEST function.

How do you handle the greatest null in Oracle?

The reason for COALESCE() is that GREATEST() returns NULL if either of the parameters is NULL . You could remove the possibility of any of the columns returning NULL by using the NVL function. Substitute any NULL values with a date that is earlier than any date that is likely to occur in your tables.

How to select greatest column in SQL Server?

SELECT GREATEST (col1, col2 …) FROM table Either of the two samples below will work: The second is an add-on to lassevk’s answer. Scalar Function cause all sorts of performance issues, so its better to wrap the logic into an Inline Table Valued Function if possible.

How to get the Max of multiple columns in SQL Server?

In SQL Server there are several ways to get the MIN or MAX of multiple columns including methods using UNPIVOT, UNION, CASE, etc…. However, the simplest method is by using FROM …. VALUES i.e. table value constructor. Let’s see an example. In this example, there is a table for items with five columns for prices.

How to select Max or greatest of three columns?

I’m trying to select the max date in three different fields in each record (MySQL) So, in each row, I have date1, date2 and date3: date1 is always filled, date2 and date3 can be NULL or empty The GREATEST statement is simple and concise but has no effects on NULL fields, so this doesn’t work well:

What to do with multiple columns in SQL Server?

If you are using SQL Server 2005, you can use the UNPIVOT feature. Here is a complete example: Using CROSS APPLY (for 2005+) …. From SQL Server 2012 we can use IIF.