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...
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...
An ORM library is written in our language of choice and encapsulates the code needed to manipulate the data. Therefore we don’t need to directly use the SQL; we can interact instantly with an object from our code, instead of a database table. The ORM tool translates the interaction into ...
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...
have permission to query the view, while denied access to the rest of the base table. SQL INTERVIEW QUESTIONS AND ANSWERS 7 | P a g e Views can join and simplify multiple tables into a single virtual table Views can act as aggregated tables, where the database engine aggregates data (su...
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 &...
In the initial interview phase, the interviewer can ask foundational questions to assess your knowledge of basic database and PL/SQL concepts. Try studying these questions and answer to prepare for the initial phase of the interview. 1. What is PL/SQL?
1.select子句中尽量避免使用* select子句中，*是选择全部数据的意思。比如语句：“select * from 成绩表...
Syntax: CREATEDATABASEDatabaseNameExample: CREATEDATABASE Studentor you can Create Database through Design/ Wizard form by right clicking on DATABASE option-New Database.What is DBMS?A Database Management System (DBMS) is a program that controls creation, maintenance and use of a database. ...
Intermediate SQL interview questions with detailed answers: 11. Find Customer Order Counts Question: Write a query to list customers who have placed more than 5 orders. Use the customers and orders tables. Answer: SELECT c.customer_id, c.customer_name, COUNT(o.order_id) AS order_count ...