sql - Union of two tables with the same columns and same where clause -


i have 2 sql tables in 2 different locations contain exact same fields, different data (all unique skus). i'd join tables , run complex clause on result logging purposes.

what have in place works, appears massively redundant (i'm coming c# background here). 

select sku, catalogname, getdate() uswebdb.commerce.catalogproducts sku not null , (categoryname not null or parentoid = 113) , (sku not '%[a-z]%') union select sku, catalogname, getdate() ukwebdb.commerce.catalogproducts sku not null , (categoryname not null or parentoid = 113) , (sku not '%[a-z]%')

is there more concise way join these 2 tables , produce similar result, or best approach? selected fields same, number of tables involved , complexity of clause might increase in near future.

i guess ideally i'd see this:

select sku, catalogname, getdate() uswebdb.commerce.catalogproducts --magic join/union-- ukwebdb.commerce.catalogproducts -- more joins...-- sku not null , (categoryname not null or parentoid = 113) , (sku not '%[a-z]%')

is possible in sql2008? over-thinking this?

are these on different servers or different databases, because makes big difference. syntax implies on same server, different database, means can move where outside:

select sku, catalogname, getdate() ( select sku, catalogname, categoryname, parentoid uswebdb.commerce.catalogproducts union select sku, catalogname, categoryname, parentoid ukwebdb.commerce.catalogproducts ) f (f.categoryname not null or f.parentoid = 113) , (f.sku not '%[a-z]%')

you shold use ctrl-l see if query plan different. there might performance repercussions.


Comments

Post a Comment

Popular posts from this blog

linux - xterm copying to CLIPBOARD using copy-selection causes automatic updating of CLIPBOARD upon mouse selection -

i've tried various ways coerce xterm (versions 285 , 292) copy selection clipboard clipboard whenever press ctrl-shift-c. promising way far has been, in ~/.xresources, put this: xterm*vt100.translations: #override \ ctrl shift <keypress> c: copy-selection(clipboard) \n\ ctrl shift <keypress> v: insert-selection(clipboard) ctrl-shift-v works perfectly, copying has nuance... if restart xterm, highlighting text puts things in primary clipboard; expected, proper, default behavior. if hit ctrl-shift-c, copies current selection clipboard clipboard. the bug, however, if highlight text after first time pressed ctrl-shift-c, you'll see highlighting copies both primary and clipboard. cannot figure out how stop xterm updating clipboard upon selection... , doesn't make sense me in first place. i said, @ specific point in time, copy selection clipboard... yet starts updating automatically upon selection after doing once... anyone have workaround...
Read more

c++ - qgraphicsview horizontal scrolling always has a vertical delta -

Image
i've subclassed qgraphicsview custom canvas used in cad application. i've reimplemented qgraphicsview::wheelevent check keyboard modifiers control key and, if control key pressed, zoom. i'm trying implement horizontal scroll when user holds shift , uses wheel. the problem i'm having horizontal scrolling always scrolls 0.279. not huge problem, hugely annoying , points else being wrong. so, here questions: is right way implement horizontal scrolling? if not, is? how eliminate delta of 0.279? thanks in advance. code , sample output below void myview::zoom(int delta) { double factor = pow(1.2, delta/abs(delta)); this->scale(factor, factor); } void myview::scrollhorizontal(int level) { qpointf center = maptoscene(viewport()->rect().center()); qdebug() << "center: " << center.x() << ", " << center.y(); centeron(qpointf(center.x() - level, center.y())); } void myview::wheelevent(qwheeleve...
Read more