CRUD queries are one of the cornerstones of every database – reading (SELECT) queries help us read data and they’re absolutely crucial to any application. Figure out how they work with us!
In the first part of the series about CRUD queries, we have walked you through the queries that help us
INSERT data into our database into our database instances. In this part, we’re walking you through the queries that read it –
SELECT queries are necessary for any application – be it web-based or not. Most of the time when our data is being read we don’t even think about the process, but our databases are quietly churning our
SELECT queries. Here’s what you need to know about them.
SELECT Queries – the Basics
In many cases, a
SELECT query looks like this: CRUD-queries are one of the cornerstones of every database, and INSERT-queries are the first ones within the list. Learn everything about them in this article.
In most cases,
SELECT queries also have a WHERE clause that specifies what exactly to search for and with the
WHERE clause they look like this:
SELECT * FROM table_name WHERE column = ‘value’;
To dig further into them, let’s enable profiling and look into what we have. First, we run our query with profiling enabled:
Once that’s done, we need to figure out the ID of the query:
And finally, we profile the query itself:
The results of the profiler are all the same – those who have read the first blog of these series will remember what each of those mean, but if you don’t, we’ve also provided the same explanations below:
INSERTs, partitions and indexes help
SELECTs be faster as they help them read through less data.
As you can probably tell, there are specific things you will need to consider when working with
SELECT queries as well. Let’s dig into those.
The Specifics of SELECT Queries
To speed up
SELECT queries, follow these tips:
Finally, make sure to employ a proper SQL client such as the one built by DbVisualizer when making use of these tips – while SQL clients themselves won’t solve the issues related to your queries, the power of SQL clients cannot be understated. Did we tell you that DbVisualizer is the one SQL client with the highest user satisfaction? It’s used by tech giants such as Netflix, Google, and Meta, as well as other companies such as Tesla and NASA (yes, the one that works on space), and if that doesn’t tell you enough, simply have a look through its features and make your own decision.
In this blog, we have walked you through the power of
SELECT queries – another necessary component in the CRUD area. These queries read through data and comprise much of the work for databases across the globe.
Now that you’ve finished with this blog, make sure to explore other blogs in these series and come back to our blog to learn more in the future!
How do I speed up SELECT queries?
SELECT queries can be made faster by making them read through less data. That’s all there is to it – employ any technique (SELECT a column instead of selecting everything, employ indexes or partitions) – the result will still be the same. If your queries read through little data, they will be fast.
Why do indexes and partitions make SELECT queries faster?
They make SELECT queries faster because they let these queries read through less data.
Why should I use a SQL client?
SQL clients help you write SQL queries with ease and ensure your database performance, availability, and security by providing multiple features that solve the most pressing problems for developers and DBAs.
Now, make use of DbVisualizer – the SQL client with the most user satisfaction. Did we tell you its premium features can be evaluated for free?