Write a query to fetch values in table test_a that are and not in test_b without using the NOT keyword. Note, Oracle does not support the above INSERT syntax, so you would need this instead: insert into test_a(id) values (10); insert into test_a(id) values (20); insert into te...
SQL Interview Questions Our schema We'll be going through six questions covering topics like query performance, joins, and SQL injection. They'll refer to the same database for cakes, customers, and orders at a bakery. Here's the schema: CREATETABLEcakes(cake_idINTNOTNULLAUTO_INCREMENTPRIMARY...
SQL stands for Structured Query Language , and it is used to communicate with the Database. This is a standard language used to perform tasks such as retrieval, updation, insertion and deletion of data from a database. 7. What is a unique key? A Unique key constraint uniquely identified e...
SQL Job Interview Questions and Answers 1 :: What is SQL (Structured Query Language)? SQL is an English like language consisting of commands to store, retrieve, maintain & regulate access to your database.Read More 2 :: What is the SQL*Plus? SQL*Plus is an application that recognizes &...
Scenario-Based SQL Interview Questions The Bottom Line Top SQL Interview Questions List for 2025 SQL is a common language for Structured Query Language, which is based on general English, whereas MySQL is a database management system. Structured Query Language is the main part of the relational ...
The Microsoft SQL Server max degree of parallelism (MAXDOP) configuration option controls the number of processors that are used for the execution of a query in a parallel plan. This option determines the computing and threads resources that are used for the query plan operators that perform the...
i will try to explain most important PL/SQL Interview Questions that may ask in interview.PL/SQL is the Procedural Language Structured Query Language which will use to add the business logic. In this article I will try to give the brief description about different PL/SQL interview questions. ...
query. Q.Whatiscorrelatedsub-query? ACorrelatedsub_queryisasub_querywhichhasreferencetothemain query. Q. What is an Integrity Constraint ? A Integrity constraint is a rule that restricts values to a column in a table. Q. What is Referential Integrity ?
Self join is just like any other join, except that two instances of the same table will be joined in the query. Here is an example: Employees table which contains rows for normal employees as well as managers. So, to find out the managers of all the employees, you need a self join....
Here are some e-commerce SQL interview questions: 1.Product Catalog Query: Write an SQL query to retrieve the names and prices of all products in the product catalog. 2.Order Summary Query: Create an SQL query to calculate the total revenue generated from orders placed in the last month. ...