SQL diff between two rows

1. How do I find the difference between two rows in SQL?
2. How do I compare two consecutive rows in SQL?
3. How do I compare values in two rows?
4. Is there a diff function in SQL?

How do I find the difference between two rows in SQL?

To calculate a difference, you need a pair of records; those two records are “the current record” and “the previous year's record”. You obtain this record using the LAG() window function. This function allows you to obtain data from the previous record (based on an order criterion, which here is “ ORDER BY year ”).

How do I compare two consecutive rows in SQL?

Here's the SQL query to compare each row with previous row. In the above query, we join sales table with itself using an INNER JOIN condition g2.id=g1.id + 1 that allows you to compare each row with its previous row. Please note, this condition depends on the fact that our id column has consecutive numbers.

How do I compare values in two rows?

On the Home tab, go to Editing group, and click Find & Select > Go To Special… Then select Row differences and click the OK button. The cells whose values are different from the comparison cell in each row are colored.

Is there a diff function in SQL?

The DIFFERENCE() function compares two SOUNDEX values, and returns an integer. The integer value indicates the match for the two SOUNDEX values, from 0 to 4. 0 indicates weak or no similarity between the SOUNDEX values. 4 indicates strong similarity or identically SOUNDEX values.