then the outer query proceeds. If not, the outer query does not execute, and the entire SQL s...
I am very new to SQL. I want to know what happens when i use "IF EXISTS" or "IF NOT EX...
But before, let's have look into the basics of views and materialized view individually for better understanding of the differences between them. Views in SQL Views are the logical and virtual copy of a table that is created by executing a "SELECT query" statement. The views are not stored...
Difference Between HAVING And WHERE Clause In SQL Server The HAVING and WHERE clauses are often confusing for beginners and experienced alike, but they serve different purposes. So, let's look at the quick difference between HAVING and WHERE Clause In SQL Server. S.No. Key Points HAVING Claus...
SQL: difference between inner and outer join Assuming you're joining on columns with no duplicates, which is by far the most common case: An inner join of A and B gives the result of A intersect B, i.e. the inner part of a venn diagram intersection....
Consider for example MySQL which allows to have in the SELECT list columns that are not defined in the Group By clause, in which case one row is still being returned per group, however if the column doesn't have unique results then there is no guarantee what will be the output! But wit...
1 row in set (0.00 sec) NOTE: The cases discussed above does not only depend on 1 and 0. Any non-zero value will be true that means if we do AND or && of two negative numbers then result becomes 1. Look at the negative case. The query is as follows: ...
When the ‘sum’ reaches or exceeds 20, the program prints a message and terminates the loop using ‘break’. Finally, the program prints the final sum. Difference Between Break and Continue Statements in C To effectively use these loop flow controllers, one needs to understand the differences...
The concept of NULL and empty string often creates confusion since many people think NULL is the same as a MySQL empty string. However, this is not the case. What Is Difference Between Null and Blank in SQL In a database,a null valuerepresents the absence of a value or the lack of a...
Gain practical knowledge in ETL, SQL, and data warehousing for data engineering. Explore Track If you have started looking for ways tolearn SQL, you may have noticed the many different dialects of SQL available to learn with some clear (and less clear) distinctions between the different dialects...