Create new class DbConn containing a connection string and a single function to insert, update and delete records. It takes query as input and return boolean. • Error correction in search and update records. • Create another function in DbConn to search records that returns the ResultSet.

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Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.