Table Counts for One Database. The query is being executed for each row of the user due to _db.Users.Select statement.. You can use below query to get only counts from tables: var counts = new { count = _db.Users.Count(), acCount = _db.Users.Count(u => u.User.State == AccountState.AwaitingConfirmation) }; The query above outputs a table that contains the row counts of all tables across the various schemas, first sorted by the table_schema column and for each table schema, sorted by the tables with the largest number of rows. You can use the COUNT function in the SELECT statement to get the number of employees, the number of employees in each department, the number of employees who hold a specific job, etc. how to apply 1 as Date instead of Count (Distinct t. Date), thats not a right. An inner join clause that is between onlinecustomers and orders tables derived the matched rows between these two tables. Here are a few ways of listing all the tables that exist in a database together with the number of rows they contain. I'm not have a permission for give the sample table data because its client production data (we should maintain confidentialy) and sory for that. ', tablename) separator ' union ') , ') t order by 3 desc') into @sql from ( select table_schema db, table_name tablename from information_schema.tables where table ... at any one point in time, there will be multiple versions of a row. At first, we will analyze the query. select t1.rows + t2.rows as total_rows from ( select count(*) as rows from Table1 ) as t1 cross join ( select count(*) as rows from Table2 ) as t2 The cross join works because each derived table has only one row. In this case, when mysql walks over each row, it will process all counts, and no need to scanning the entire table … The following query COUNT the number of rows from two different tables (here we use employees and departments) using COUNT(*) command. I have three tables (dataentry,Dat1,Dat2) as show below the relation between them ! At a customer site, I've recently encountered a report where a programmer needed to count quite a bit of stuff from a single table. If we run the above query on our test database, we should see the following output. I wonder if there is a way to make all counts in one query. To get the number of rows in a single table we usually use SELECT COUNT(*) or SELECT COUNT_BIG(*). This is quite straightforward for a single table, but quickly gets tedious if there are a lot of tables, and also can be slow. The SQL COUNT function is an aggregate function that returns the number of rows returned by a query. The report looked roughly like this (as always, I'm using the Sakila database for illustration): And then, unsurprisingly, combinations of… Select multiple counts, in multiple tables, in one SQL query - If you want to do multiple COUNT(), in multiple tables, and output them in a single SELECT statement with each COUNT being a column; you can use a SQL query like this: For each count, mysql needs to walk thoughout the table, and this is a big problem if having long table and numerous queries. SQL Code: SELECT( SELECT COUNT(*) FROM employees ) AS Total_Employees, (SELECT COUNT(*) FROM departments ) AS No_Of_Departments FROM dual Output: Select COUNT(*) from multiple tables. The following colored tables illustration will help us to understand the joined tables data matching in the query. How to Combine Select count(*) from multiple tables. Hi. Because the result should come 332 rows but 1 as Date will provide only one result because of Group By. 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