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...
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...
Let’s summarize the key differences between the GROUP BY clause and the DISTINCT clause: 5. Conclusion In this article, we’ve explored the differences between the GROUP BY and DISTINCT clauses in SQL. GROUP BY is ideal for aggregating data with summary functions, whereas DISTINCT is useful ...
I am very new to SQL. I want to know what happens when i use "IF EXISTS" or "IF NOT EX...
Now we will see thedifference between the HAVING and WHERE clauseon various points. Conclusion As you can see both WHERE and HAVING are used in different scenarios. You can use both in a SQL query as and when required for writing the desired logic. Both are an integral part of any SQL ...
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...
Types of Outer Join - Left Outer Join, Right Outer Join, and Full Outer Join. 3 There must be at least one matching data between the two tables. There may not be any matching data between the two tables. 4 It never produces NULL values. It can produce NULL values. 5 It will not ...
JOINs in the SQL can be broadly categorized into two groups: 1. INNER JOIN 2. OUTER JOINThere are three types of OUTER JOINs in SQL.LEFT OUTER JOIN RIGHT OUTER JOIN FULL OUTER JOININNER JOINThe INNER JOIN between two tables returns all the rows which are present in both the tables. ...
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We have earlier seen thedifference between SQL and NoSQL. In this post, I will tell you the basic difference betweenSQLandMySQL. Most people find it hard to wrap their head around SQL and MySQL, and you might be one of those. There are books about SQL everywhere, and for a good reaso...