sql - Number of similar columns occurences -

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I'm new to SQL Server and need your advice on something. / P> 

  I have created a small table with two columns: ** Specific_Bank ** ** Number ** ----------------------------- 31 1 51 2 61 3 71 2 >  
 The NUMBER column of the second table, showing the number of events in the bench_id. I have tried this code:  
  [dbo]. Select batch_id (batch_id, number) specific [dbo] .big_table.batch_id, (Select number ([dbo] .big_table.batch_id] [Dbo] .big_table [dbo] .big_table   < P> But the correct answer can not be found, I am hoping that with the number of bench_id can you tell me what I am doing? Thank you in advance!   
 < Div class = "post-text" itemprop = "text"> 
 You need to be a  group BY  clause  to count the  benchID  ()  to use  
  include in BATCH_ID (separate_bench), select a specific number of benchID, BATCH_ID     COUNT (*) number from the group

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