This resource offers a total of 125 SQL Aggregate Functions problems for practice. It includes 25 main exercises, each accompanied by solutions, detailed explanations, and four related problems. [AnEditoris available at the bottom of the page to write and execute the scripts.] 1. Calculate Total...
Learn how to use aggregate functions for summarizing results and gaining useful insights about data in SQL.
2)Select the statement that shows the number of countries with population smaller than 150000 3)Select the list of core SQL aggregate functions 4)Select the result that would be obtained from the following code: 5)Select the statement that shows the average population of 'Poland', 'Germany' ...
SQL has many cool features and aggregate functions are definitely one of these features, actually functions. While they are not specific to SQL, they are used often. They are part of theSELECTstatement, and this allows us to have all benefits ofSELECT(joining tables, filtering only rows and ...
SQL Aggregate Functions [125 Exercises] SQL Formatting query output [60 Exercises] Advanced Querying Techniques SQL JOINS [29 Exercises] SQL SUBQUERIES [39 Exercises] SQL Union[9 Exercises] SQL View[16 Exercises] HR Database-Specific Exercises ...
Aggregate functions can be useful and are quite simple to use. In this chapter from SQL in 24 Hours, Sams Teach Yourself, 6th Edition, you learn how to count values in columns, count rows of data in a table, get the maximum and minimum values for a column, figure the sum of the ...
SQL aggregate functions are used to perform calculations on multiple table values and return a single result. SQL has 5 aggregate functions —SUM,COUNT,AVG,MIN,MAX. Step 3: Grouping and Sorting Next, learn about theGROUPBYandORDERBYcommands. These are especially useful when you need to view yo...
PostgreSQL 8.2 and above has this pretty neat feature of allowing you to define aggregate functions that take more than one column as an input. First we'll start off with a rather pointless but easy to relate to example and then we'll follow up with something a bit more interesting. ...
SQL Aggregate functions: The aggregate functions used in SQL compute a value based on a set of values. Examples of aggregate functions include SUM, AVG, COUNT, MAX, and MIN. String manipulation: SQL text manipulation is achieved using the following functions: CONCAT, SUBSTRING, LENGTH, and REPL...
Learn how to use aggregate functions for summarizing results and gaining useful insights about data in SQL. Sayak Paul 9 min Tutorial How to Use the SQL REPLACE() Function Learn the application of the SQL REPLACE() function in text manipulation. Understand the use of the REPLACE() function ...