CASE condition WHEN condition value THEN statement ELSE additional statement; Example We can use CASE to evaluate multiple conditions for a single variable, “job_id.” If “job_id” is “ACCOUNT,” the salary increase is 10%; if “job_id” is “IT_PROG,” the salary inc...
In PostgreSQL, loops are used in the queries to perform single code/statements for multiple rows in the table. The continue statement can be integrated with the loop to skip the values that satisfy the condition mentioned in the block of the statement This guide has explained the use of a ...
A database in Postgres can store a gigantic amount of data. Therefore, traversing through the PostgreSQL database to fetch the desired data may take some time. This becomes more hectic when a user has to execute a specific query again and again to achieve a specific purpose. To avoid these...
Learn how to use Vacuum for Better PostgreSQL Performance in our Free Webinar When done correctly, vacuuming can greatly speed up performance and optimize dead space. However, vacuuming can also degrade performance when done incorrectly. Our expert-led webinar, “Using Vacuum to Clean Up PostgreSQL ...
We can use UPDATE JOINS to add values from a separate table. In the below example, we have updated the values in the second table by joining the values from the first table specifying the condition in the WHERE clause. Update the values in the second table by joining...
Use the formula below to apply the AND Function: =AND(C5>60,D5>60) Click Enter. Use AutoFill. Read More: How to Use Greater Than or Equal to Operator in Excel Formula Method 4 – Using the IF Function to Apply the If Greater Than Condition We want to return ‘Passed’ for numbers...
PostgreSQL allows you to use theunnest ()function with theLIMITclause. In this case, the resultant table (after expansion of arrays) will be limited to the condition described in theLIMITclause. The examples below will clarify the idea. ...
by Peter Celentano and Tracy Jenkins on 04 SEP 2024 in Advanced (300), Amazon Aurora, Amazon RDS, PostgreSQL compatible, RDS for PostgreSQL, Technical How-to Permalink Comments Share With the application layer being the visible portion of a website, optimizing the database that powers...
5.2. UsingCOUNT()With Boolean Condition in MySQL In MySQL, we can use the IF condition in theCOUNT()function to achieve the same requirement: SELECT COUNT(IF(position = 'Assistant Professor', 1, NULL)) AS assistant_professors, COUNT(IF(position = 'Professor', 1, NULL)) AS professors ...
You create a cursor calledcurusing theconnection.cursor()method, which allows Python code to execute PostgreSQL commands in a database session. You use the cursor’sexecute()method to delete thebookstable if it already exists. This avoids the possibility of another table namedbooksexisting, w...