8 :: What is sql JOIN? JOIN is the form of SELECT command that combines info from two or more tables.Types of Joins are Simple (Equijoin & Non-Equijoin), Outer & Self join.Equijoin returns rows from two or more
3) A lot of operators are available in SQL. What are the various operators in SQL? These kinds ofSQL interview questionsconfuse the candidate at times. So, coming to the question, there are three different kinds of operators available in SQL. They are: Arithmetical operators Logical operators ...
The SQL Joins refer to combining rows from two or more tables based on a related column between them. Various types of Joins can be used to retrieve related data, and it depends on the relationship between tables. There are four types of Joins: Inner Join: returns records that have matchin...
SQL Server books online has enough information on this topic and there is a good white paper available on Microsoft site. 12. Explain the architecture of SQL Server This is a very important question and you better be able to answer it if consider yourself a DBA. SQL Server books online is...
1. What is connection pooling in sql server? 2. Difference between partition by and patindex 3. What are the database design patterns? 4. What are the storage models in OLAP? 5. What is the difference between CROSS / OUTER APPLY AND JOINS in T-SQL?
20. How do you handle duplicate data in SQL? You might want to clarify a question and ask some follow-up questions of your own. Specifically, you might be interested in A., what kind of data is processed, B., and what types of values users can duplicate. ...
SQL queries with basic group by self joins and inner queries. The problem could be solved by analytical queries. SQL and why is the number of likes increasing? There’s a game where you are given two fair six-sided dice and asked to roll. If the sum of the values on the dice equals...
This question combines coding and problem-solving. Steps to optimize: Rewrite query: Use efficient joins, avoid unnecessary subqueries, and apply proper indexing. Use EXPLAIN plan: Analyze the query execution plan to identify bottlenecks. Partitioning: If the table is large, use partitioning to reduc...
§ Dataset can fetch source data from many tables at a time, for Recordset you can achieve the same only using the SQL joins. 4. What is the difference between an abstract method & virtual method? Answer: An Abstract method does not provide an implementation and forces overriding to the de...
Doing so usually improves SQL code by breaking down complex logic, which makes it easier to understand. For example, if you want to convert the date format from "YYYY-MM-DD" to "MM/DD/YYYY", here's a sample dbt macro for this, which we saw in a previous question: {% macro ...