DataBase Notes

1. What is SQL?Answer: Structured Query Language (SQL) is a language that provides an interface to relational database systems.
   In common usage SQL also encompasses DML (Data Manipulation Language), for INSERTs, UPDATEs, DELETEs and DDL (Data Definition Language), used for creating and modifying tables and other database structures.
   
2. What is SELECT statement?Answer: The SELECT statement lets you select a set of values from a table in a database.The values selected from the database table would depend on the various conditions that are specified in the SQL query.
   
3. How can you compare a part of the name rather than the entire name?Answer: SELECT * FROM people WHERE empname LIKE '%ab%'Would return a recordset with records consisting empname the sequence 'ab' in empname.
   
4. What is the INSERT statement?Answer: The INSERT statement lets you insert information into a database.
   
5. How do you delete a record from a database?Answer: Use the DELETE statement to remove records or any particular column values from a database.