Nov 21, 2009 · SELECT COUNT(user_table.id) AS TableCount,'user_table' AS TableSource FROM user_table UNION SELECT COUNT(cat_table.id) AS TableCount,'cat_table' AS TableSource FROM cat_table UNION SELECT COUNT(course_table.id) AS TableCount, 'course_table' AS TableSource From course_table;

Oct 29, 2013 · I had a very simple question: Does oracle allow multiple "WITH AS" in a single sql statement. Example: WITH abc AS( select .....) WITH XYZ AS(select ....) /*This one uses "abc" multiple times*/

Aug 13, 2015 · The UNION operator joins the results of two or more SELECT statements to produce a single result set. The first column in the SELECT statement is used to sort the result set. SELECT name, games, goals FROM tblMadrid WHERE name = 'ronaldo' UNION SELECT name, games, goals FROM tblBarcelona WHERE name = 'messi' ORDER BY goals;

Dec 18, 2023 · After the WITH clause, you need to put the name of the CTE, then the AS keyword and finally between parentheses the SELECT query to define the CTE. If you want to learn how to use multiple WITH statements in one query, I recommend …

Dec 2, 2024 · In SQL, the SELECT AS clause is an essential feature that helps improve query readability and makes our database results more understandable. By aliasing columns and tables, we can provide meaningful names to our output, making complex queries easier to …

May 7, 2020 · By using nested SELECTs, you can filter, aggregate, and transform data in ways that provide deeper insights and more precise results. In this article, I'll explain what nested queries are, why they're useful, and how to use them efficiently.

Oct 12, 2024 · We can use it in various parts of an SQL statement, such as the SELECT, FROM, or WHERE clauses. For example: SELECT column1, column2, ... FROM table_name. WHERE column_name operator (SELECT column_name . FROM table_name . WHERE condition . );

Mar 24, 2021 · Is it possible to select multiple rows using one query in SQL Server? For example, I have to run two queries to get my results as follows. How can I achieve the results using one query? The first query is the fastest, with an iNDEX on order_number. Thanks, I'm good to go! An alternative to nbk's solution is using the UNION ALL clause like so:

Jun 28, 2011 · Is there a way to do a query like this dynamically, to do UNION / SELECT in a loop based on values in an existing column? depends on which database you’re using. MS Access has CROSSTAB queries,...

Apr 19, 2014 · I need to merge two SELECT queries. Both have different where clauses. For example. U_REGN as 'Region', . COUNT(callID) as 'OpenServices', SUM(CASE WHEN descrption LIKE '%DFC%' THEN 1 ELSE 0 END) 'DFC' ([status] = - 3) . U_REGN. 'OpenServices' desc. This gives me result. I have another query. U_REGN as 'Region', . COUNT(callID) as 'ClosedYesterday'