ansi-sql

I am translating SQL Server SQL Statements into their ANSI generic equivalent at present, and am stuck with a recursive statement using a WITH statement. For the sake of concentrating on the issue, I'll simplify the issue as follows If I have two tables ReportingUnit col1: Key col2: ParentReportingUnitKey Facility col1: Key col2: ParentReportingUnitKey This structure is describing a hierarchy of reporting units down to a facility, where a reporting unit may have 0 .. 1 direct parent reporting units and 0 .. n child reporting units. A facility is a 'leaf' record, that links to a reporting unit.

I know there is really no difference, but is 'LEFT JOIN' an ANSI form or are there any RDBMS's that will fail 'LEFT JOIN' and require 'LEFT OUTER JOIN'. [I am asking here so I can save a few clicks, form fillings, etc to get the correct ANSI standard!] [OUTER] is optional, per the ANSI spec ( 92 , but I'm sure later versions also cover it). Of course, you're assuming that every SQL product is ANSI compatible. For joins, they probably are.. ANSI JOINS http://www.oratechinfo.co.uk/ansi_joins.html Note, the OUTER can be dropped, since, by definition, LEFT, RIGHT and FULL JOINs MUST be OUTER joins

I am using an ORM (sqlalchemy) to fetch data from a PG database. I want to avoid specifying all the table column names in my hand crafted SQL statements*. My assumption so far is that the returned columns are in the order of the DDL statements used to create the db tables. So far this is working - but I want to know if this is merely luck, or if it is specifically addressed in the (ANSI) SQL specification. i.e. does ANSI SQL (and thus presumably the database) guarantee the order of columns returned in a SELECT * statement? I am using PostgreSQL 8.4 as my backend db yes, I am aware that using

I am attempting to make an application capable of running on both Sql Server and PostgreSQL. I can not seem to find a common expression that is basically select * from table where booleancol=false on SQL Server I must do(which is very confusing because the default value for bit types must be true or false, but you can't assign them to true or false or test against it) select * from table where booleancol=0 on PostgreSQL I must do select * from table where booleancol is false There are quite a lot of queries in our program that does this, so I'd prefer if there was just some universal syntax I