Imagine you are the head of a department in your company and want to find the list of unique names in your department. One way of doing this is by usingSQLqueries to create a list of unique names. SQL queries are the commands we use to get some information from a database. In this ...
you may find yourself working with a database where duplicate rows have been created through human error, a bug in your application, or uncleaned data from external sources. This tutorial will teach you how to find these duplicate rows. ...
How to find distinct sum of a column in sql server? I have a table like this structure: lineID lineItemPrice 1 20 2 25 3 27 4 30 4 30 4 30 I want to get the sum of lineItemPrice where lineId is distinct. I am not sure what should be sql query? Please help. sqlsql-serve...
With GROUP BY and HAVING, you can select distinct values based on group of columns. Where having can be used to find duplicate values also. Functionality-wise group by and distinct works similarly but group by also provide flexibility to use aggregate functions along with getting unique data. P...
If your data stored in the one column and separate with space, you could use split function to store them in a table and then use distinct to find the unique value.Please check below query:複製 declare @temp varchar(50) Select @temp = replace(Name,' ',',') from ( Select 'aaa ...
Let’s find the number of different (and non-NULL) cities. Solution SELECTCOUNT(DISTINCTcity)ascities FROMcustomer; This query returns number of cities where customers live: cities 3 Discussion To count the number of different values that are stored in a given column, you simply need to desig...
2 SQL select top X rows having sum limit 2 Distribute values equally in count and sum to a set of users 8 TOP(1) BY GROUP of very huge (100,000,000+) table 0 Top x distinct values ordered by date for each uid 2 Determining the overlap between payments and invoices Hot Netw...
How to get count for different columns on same table OVER Clause (Transact-SQL) Using PIVOT and UNPIVOT SUM over distinct rows with multiple joinsnear Rolling sum / count / average over date interval The long Version Following the data and definitions for each table involved in the...
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Query : db.getCollection('qaa').find({roll_no : {$gte : 0}},{_id : 0, roll_no : 1}) Index : db.getCollection('qaa').createIndex({roll_no : 1}) If the index here is in WT Internal Cache then it would be a straight forward process to get the values. An index...