In my previous articles I have explained theSQL interview questions ,BI Interview questionswhich will give the best idea about the question that may ask in interview. In this article i will try to explain most important PL/SQL Interview Questions that may ask in interview.PL/SQL is the Proced...
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...
Following are some important Interview Questions for SQL : 1.What is SQL?Where SQL is used? Answer: SQL is Structured Query Language, which is a computer language for storing, manipulating and retrieving data stored in relational database.SQL can be used in different languages or database manag...
Important thing to note: By default a clustered index gets created on the primary key, unless specified otherwise. 10. What's the maximum size of a row? 8060 bytes. Don't be surprised with questions like 'what is the maximum number of columns per table'. Check out SQL Server books ...
It’s most important to be attentive of the arrange of operations in an interrelated subquery.First, a row is processed in the outer doubt.Then, for that exacting row, the subquery is executed – as a result for each row processed by the outer query, the subquery will also be processed....
optimizing the SQL queries above might seem insignificant due to their scale(ms). But as the amount of data you work with grows, these milliseconds will increase to seconds, minutes, and possibly even hours. You’ll realize then that these SQL query optimization techniques are highly important....
SQL Server Profiler is a tool for monitoring and analyzing SQL Server events. It captures and records data about each event, such as query execution, performance metrics, and errors. It allows database administrators to diagnose performance issues, identify slow-running queries, and audit SQL Serve...
Is visible to the current query only Global Temp Table: “CREATE TABLE ##TempTable” This differs from a #temp table in that it is visible to all processes. When the creating process ends, the table is removed (but will wait until any current activity from other processes is done). ...
4. How to find the query running on a given SPID? 5. What is XACT_ABORT ON? 6. Can we use two CTE’s in a single select query? 7. What are the different join operators in SQL Server? 8. Can we use a table variable inside a nested stored procedure if the table variable created...
The rest is on you! Practice coding in SQL and Python and solve as many actualdata analyst interview questions. But also don’t forget to use other resources and practice other data analysis skills. Coding is important, but it’s not everything. ...