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Drastic change in query speed when changing from Oracle 9i to ANSI outer join syntax

I am working on simplifying a query originally written for Oracle 9i. In the process I changed the join syntax from the Oracle 9i syntax to ANSI. The names of the tables and columns have been changed ...
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Does SQL/MED (ISO/IEC 9075-9) defines a writable foreign data wrapper interface

I just can't find anything about it. I don't have the paper or draft of the SQL:2011, and have almost only drafts from SQL:2008, 2006, 2003. Does anyone know if "SQL/MED (ISO/IEC 9075-9)" defines a ...
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Emulate regex matching in ANSI SQL

I'm working in an ANSI SQL environment (no regex) on a script that is supposed to take the first 8-10 consecutive digits out of a text field that could: have alphanumeric characters, and some other ...