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POIBM Informix SQL Syntax assistance
 

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  1. POIBM Informix SQL Syntax assistance
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    <p>Wondering if anyone may be able to help me with some SQL here. I'm tasked with retrieving some data from a legacy DB system - It's an IBM Informix DB running v7.23C1. It may well be that what I'm trying to do here is pretty simple, but for the life of me I can't figure it out.</p> <p>I'm used to MS SQL Server, rather than any other DB system and this one seems quite old: <a href="http://publib.boulder.ibm.com/epubs/pdf/3731.pdf" rel="nofollow">http://publib.boulder.ibm.com/epubs/pdf/3731.pdf</a> (?)</p> <p>Basically, I just want to run a query that includes nesting, but I can't seem to figure out how to do this. So for example, I have a query that looks like this:</p> <pre><code>SELECT cmprod.cmp_product, (stock.stk_stkqty - stock.stk_allstk) stk_bal, stock.stk_ospurch, stock.stk_backord, 'Current Sales Period', 'Current Period -1', 'Current Period -2', cmprod.cmp_curcost, stock.stk_credate, stock.stk_lastpurch, stock.stk_binref FROM informix.stock stock, informix.cmprod cmprod WHERE stock.stk_product = cmprod.cmp_product AND (cmp_category = 'VOLV' OR cmp_category = 'VOLD' OR cmp_category = 'VOLA') AND stk_loc = 'ENG'; </code></pre> <p>Now, basically where I have values like 'Current Period -1' I want to include a nested field which will run a query to get the sales within a given date range. I'm sure I can put those together separately, but can't seem to get the compiler to be happy with my code when executed altogether.</p> <p>Probably something like (NB, this specific query is for another column, but you get the idea):</p> <pre><code>SELECT s.stmov_product, s.stmov_trandate, s.stmov_qty FROM informix.stmove s WHERE s.stmov_product = '1066823' AND s.stmov_qty &gt; 0 AND s.stmov_trandate IN ( SELECT MAX(r.stmov_trandate) FROM informix.stmove r WHERE r.stmov_product = '1066823' AND r.stmov_qty &gt; 0) </code></pre> <p>What makes things a little worse is I don't have access to the server that this DB is running on. At the moment I have a custom C# app that connects via an ODBC driver and executes the raw SQL, parsing the results back into a .CSV.</p> <p>Any and all help appreciated!</p>
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