When dealing with SQL databases, users will have to interact with different data types and schemas depending on the project's requirements. Since databases are used in many different applications and support multiple platforms, devices, and users, there may be differences in how data is entered, even in a simple field like a phone number.
For example, one set of users will enter the phone number with the country code, while the others may simply ignore the country code. Therefore, it is essential for database users to know how to clean data in a SQL database. In this post, we will see how to utilize SQL string operations on phone number fields to properly clean, format, and extract data.