sql asp 500pts

WhereString =   "SubString(Stock_Master.Bond_No,6,len(Stock_Master.Bond_No)) ='" & bondno & "' ORDER BY Stock_Master.Bond_No asc"  
I have partial of sql statement, and above sql code makes my query really slow. Is anyway I can use some other codes to make it faster?
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Is this for Oracle or SQL Server or something else? It's always wise to state the product and version.

Try using a LIKE expression in place of = and SUBSTRING.

Your code looks dangerously vulnerable to SQL injection. There will be a proper way to do parameterisation in your host language of choice and you really ought to be using it.
Guy Hengel [angelIII / a3]Billing EngineerCommented:
for sql 2000:
create a computed column for the substring() expression, index that field, and do the search using that computed column

if it had been for oracle:
create a function-based index on that substring() expression, and the query would take that index automatically without changing that query

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