When I update a particularly large table, the update times out 开发者_如何学Gobecause the table is locked while the indexes rebuild. Is there any way to rebuild the index ONLINE (i.e. Oracle) so the u
I have searched the web but could not find an answer. how do I have set base index in the matrix, such that indexes start from values other than zero? for example:
I have a little DB, for academic purpose only, and I have object tables at most. I\'ve created a entity-relationship model (ERM) in Power Designer and the program, by default, creates index for the se
开发者_如何学GoWhy I can\'t use table.sort to sort tables with associative indexes?In general, Lua tables are pure associative arrays. There is no \"natural\" order other than the as a side effect of
I\'m looking for some advice开发者_如何转开发 to how to get the indexes running better on this query...
I\'ve got a table (InnoDB) with a fair number of indices.It would be great to know if one (or more) of these was never actually used.I don\'t care as much about the disk space, but insertion speed is
I am new to databases. I have a classifieds website with MySQL db and I am soon about to use SOLR to index them also. Then whenever a query is done, SOLR will return ID:s and I will match those ID:s t
From my understanding you don\'t gain much by setting an index in a column that will hold few distinct values.
Is it better if I use ID nr:s instead of VARCHARS as foreign keys? And is it better to use ID nr:s isntead of VARCHARS as Primary Keys?
Attempt #2: People don\'t seem to be understanding what I\'m trying to do.Let me see if I can state it more clearly:
加载中,请稍侯......