Fetching cursor – Once a cursor is opened, rows can be fetched one by one or in a block to perform data manipulation. Top 50 SQL Server Interview Questions & Answers . It is the default authentication mode in SQL Server. Enterprise edition includes a core database engine and add-on services, with multiple tools for creating and managing a SQL server cluster. It is slower than the clustered index in terms of SELECT queries. It supports Windows authentication as well as SQL Server authentication. Let us now have a look at the advanced SQL Server Interview Questions and Answers. There are various collations that exist in SQL server, but 2 are main: Where CI is case insensitive, and CS is case sensitive. Differential backups record transactions that occur during the differential backup process. Suppose your server is running fine. All the tables would reference there for use. Triggers can also be utilized to execute a stored procedure. These questions will help students build their concepts around SQL Server and help them ace the interview. SQL Server Agent is a background tool for Microsoft SQL Server. This way there will not be any inconsistency and extra memory consumption. We can configure the server to listen to a specific port. "deleted" table stores the data of last deleted row or âdelete operationâ. There is a whole lot of complexity involved in the database schema. We can perform our queries on it. Let’s move to the list of SQL Server Questions. It then truncates the transaction log. Indexes can help speed up a SELECT query. There are various merits and demerits of index usage in SQL server. Local temporary tables are prefixed with a single pound â#â symbol. Answer: When data needs to be updated row-by-row, cursors can be very handy. Multiple servers having data can be synchronized with the replication process using a replica set. Consider a scenario, there is a Credit Card company which maintains a database. Please make sure you're available for next. When a single clustered index and a single non-clustered index is present. Global temporary tables are visible to all SQL Server sessions. It executes them sequentially and at a scheduled time. The above code raises divide-by-zero error and handles it in the catch block. Outside the catch block they return NULL. This SQL Server Interview Questions blog comprises all the questions that are asked by companies in most SQL-based job interviews. Now, this is a disaster as all the bills of this particular customer will be sent to the wrong address. Views are the most beneficial entity for an SQL server developer. Thus, the performance of a database can be improved significantly by aggregating the data. Views are the most beneficial entity for an SQL server developer. What Is SQL Profiler? Some of them might be common usage while others can be more technically oriented. Triggers available in SQL server are listed below: DML trigger: They are called a Data manipulation trigger. Enable auditing with encryption, disabling the guest account. Standard edition includes a database engine, along with standalone services. Your application is booming all over the internet. It helps in quickly locating and accessing the data in the database. You can use it, for example, to enforce referential integrity in the database. What youâll do? At the same time, customizing the data for a particular set of users can be a tedious task, which is equally complex as database schema design. Insert, delete, or update becomes slower since each operation index must be updated. Now, all the data is gone and thereâs nothing to show. Database creation, backup, security, and replication like feature makes SQL server one of the top database management tool. Hotfixes in SQL Server are the updates to fix issues which are not released publicly. Practice SQL Server Questions asked in Interviews. A UNION select rows whereas a JOIN selects columns from two or more tables. It helps the database administrator(DBA) to schedule a job to run after a specific interval of time. SQL Server is a relational database management system. Youâll make another table with columns âcountryâ and âcount_of_peopleâ which is sorted by the country name. Its mainstream editions include Enterprise, Standard, Web, Business intelligence, Workgroup, and Express. Production and development-based environment can be controlled and managed by these triggers. Q #2) What is the difference between clustered and non-clustered index? Can we add a CPU to SQL Server? There can only be one clustered index per table. This is where normalization of the database comes into play. Temporary tables are useful when we want to work with a small subset of records from a large table. Querying data is faster when there is no index in a table. This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. Synchronize the data can also be achieved with replication to maintain consistency. Its syntax is: Example- “Test” database can be created to CREATE DATABASE Test. Global temporary tables are prefixed with double pounds â##â symbol. All editions have their own set of features depending upon the business case scenario. Transactions that occur during the backup are also recorded. Log shipping is a process in which we automate the back-up process of transaction log files. SQL Server provides two ways to view data in magic tables. DDL trigger gets fired whenever a user tries to manipulate data using DDL(Data Definition Language) event on the database server. Different index configurations possible for a table are: When only a single clustered index is present. Log shipping helps in mitigating the risk of disasters. This is the reason we always want to back up our data. So, by default collation is case insensitive, thus all database in it is also case-insensitive. DML trigger gets fired whenever a user tries to manipulate data using DML(Data Manipulation Language) event on the database server. SSRS does that exact thing. Example – Character data is sorted using rules that define the right character sequence, with an option for specifying case-sensitivity, character width, etc. If you are looking for sql interview questions you can visit, We match you real time with a suitable peer. These rules can be referred to as Collation.
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