## What is the difference function in SQL?

SQL Server DIFFERENCE() Function 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.

**How do you find the difference between two query results in SQL?**

The Minus Operator in SQL is used with two SELECT statements. The MINUS operator is used to subtract the result set obtained by first SELECT query from the result set obtained by second SELECT query.

### Can I compare two strings in SQL?

In SQL, we can compare two strings using STRCMP () function. STRCMP () returns ‘0’ when the two strings are the same, returns ‘-1’ if the first string is smaller than the second string, and returns 1 if the first string is larger than the second string.

**How do I check if two strings are not equal in SQL?**

SQL Not Equal (!=) In SQL, the not equal operator is used to check whether two expressions are equal or not. If it’s not equal, then the condition will be true, and it will return not matched records.

## What is difference in difference analysis?

The difference-in-differences method is a quasi-experimental approach that compares the changes in outcomes over time between a population enrolled in a program (the treatment group) and a population that is not (the comparison group). It is a useful tool for data analysis.

**What does MINUS function do in SQL?**

A Minus Query is a query that uses the MINUS operator in SQL to subtract one result set from another result set to evaluate the result set difference. If there is no difference, there is no remaining result set. If there is a difference, the resulting rows will be displayed.

### How do I check if two strings are equal in SQL?

MySQL STRCMP() Function The STRCMP() function compares two strings.