Amazon Interview Questions and Answers

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language.

• It is used to create, modify, and query databases.

• DDL (Data Definition Language) is a subset of SQL used to define the structure of a database.

• DDL commands include CREATE, ALTER, and DROP.

• I should be hired because of my experience and skills in SQL programming and database management.

SQL is a programming language used for managing and manipulating relational databases.

• SQL stands for Structured Query Language.

• It is used to communicate with and manipulate databases.

• SQL can be used to create, modify, and retrieve data from databases.

• Common SQL commands include SELECT, INSERT, UPDATE, and DELETE.

• SQL is widely used in web development and data analysis.

SQL is a programming language used to manage and manipulate relational databases.

• DDL stands for Data Definition Language and is used to define the structure of a database.

• DML stands for Data Manipulation Language and is used to manipulate data within a database.

• Examples of DDL commands include CREATE, ALTER, and DROP.

• Examples of DML commands include SELECT, INSERT, UPDATE, and DELETE.

To find the second highest value in a table, we can use the ORDER BY and LIMIT clauses in SQL.

• Write a SQL query to select all values from the table in descending order

• Use the LIMIT clause to select the second row

• Retrieve the value from the column containing the values

A cursor is a database object used to manipulate data in a result set.

• A cursor allows you to iterate through a result set one row at a time.

• It can be used to update or delete specific rows in a result set.

• There are two types of cursors: static and dynamic.

• Example: DECLARE cursor_name CURSOR FOR SELECT * FROM table_name;

• Example: OPEN cursor_name; FETCH NEXT FROM cursor_name INTO variable_name;