Problem in Query? [Answered]RSS

• • Reply
  prabhjot1313

  Member

  25 Points

  71 Posts

  Problem in Query?

  Jun 07, 2020 09:00 AM|prabhjot1313|LINK

  hello where is error in my query where userid column  count userid + 1 and provide result

  please execute them?

  
  SELECT MAX(user_id) count + 1 as user_id FROM tbl_dummy

• • Reply
  mgebhard

  All-Star

  48451 Points

  21311 Posts

  Re: Problem in Query?

  Jun 07, 2020 11:19 AM|mgebhard|LINK

  prabhjot1313

  hello where is error in my query where userid column  count userid + 1 and provide result

  please execute them?

  
  SELECT MAX(user_id) count + 1 as user_id FROM tbl_dummy

  I think you are looking for the following syntax.

  SELECT MAX(user_id) + 1 AS user_id 
  FROM tbl_dummy

  However, you probably should be using an IDENTITY column for user_id.  

  https://docs.microsoft.com/en-us/sql/t-sql/statements/create-table-transact-sql-identity-property?view=sql-server-ver15

• • Reply
  XuDong Peng

  Member

  380 Points

  116 Posts

  Re: Problem in Query?

  Jun 08, 2020 07:26 AM|XuDong Peng|LINK

  Hi, prabhjot1313

  The main error of your query is on the count keyword, which is a sql function used to count the number of records.

  So your syntax is wrong, and your query cannot be executed correctly.

  More details, you could refer this document.

  On the other hand, because I don’t know the structure of the data table and the data in the table, based on your query, I guess you might want to do this:

  • Query the maximum number of user_id records and add 1 to the number of records.

           If this is the case,the query should like this:

  select count(user_id)+1 as [count] from tbl_dummy where id = (select max(user_id) from  tbl_dummy)

  • Query the value of the largest user_id and add 1 to this value

           If this is the case,the query should like this:

  select max(user_id)+1 as user_id from tbl_dummy

  Best regards,

  Xudong Peng