以及施加表之间的约束create database-创建新数据库alter database-修改数据库create table-创建新表alter...
There are a few rules for database normalization. Each rule is called a “normal form.” If the first rule is observed, the database is said to be in “first normal form.” If the first three rules are observed, the database is considered to be in “third normal form.” The third ...
Structured Query Language is the main part of the relational database, which can be utilized for gaining access to the database and also plays a major role in the management of the database. On the other hand, MySQL is a Relational Database Management System like SQL Server, Informix, and...
首先,我们需要创建一个新的数据库来存储面试题相关的数据。 CREATEDATABASEInterviewQuestions; 1. 2. 创建表格 接下来,我们需要在数据库中创建一个表格来存储面试题的相关信息。 USEInterviewQuestions;GOCREATETABLEQuestions(IDINTPRIMARYKEY,QuestionText NVARCHAR(255)NOTNULL,AnswerText NVARCHAR(255)NOTNULL); 1. ...
SQL Interview Questions http://career.guru99.com/top-50-sql-question-answers/ 1. What is DBMS? A Database Management System (DBMS) is a program that controls creation, maintenance and use of a database. DBMS can be termed as File Manager that manages data in a database rather than ...
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 &...
Want more SQL interview prep? Try your hand with this free practice question: Cocoa Confections is a small bakery that sells brownies, cookies, pies, and other delicious treats to customers online. It keeps records of all of its online sales in an SQL database that is automatically populated...
Q. “model” system DB is down and we are trying to create a new database. Is it possible to create a new database when model DB is down? Ans: We can’t create a new database when model database is down. SQL Server restart will be unsuccessful when model database is down as TE...
When a exclusive lock is applied on data item, other transactions can't read or write into the data item. 34.What are the different type of normalization? Frequently asked SQL Interview Questions In database design , we start with one single table, with all possible columns. Lot of ...
To help, I am providing a guide on PL/SQL interview questions. I will begin with the fundamental concepts and move forward to more advanced topics like bulk processing, dynamic SQL, and performance tuning. If you want to understand the foundational concepts of the Oracle database, I recommend...