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使用access作數(shù)據(jù)庫的站長會(huì)發(fā)現(xiàn)，隨著時(shí)間的增長你的數(shù)據(jù)庫會(huì)越來越大，甚至你刪除數(shù)據(jù)數(shù)據(jù)庫不會(huì)變小還會(huì)變大，其實(shí)在access數(shù)據(jù)庫里還有好幾個(gè)隱藏表！有次一個(gè)人讓我給他看看網(wǎng)站，網(wǎng)站占用空間500多m,他壓縮后發(fā)給我后是50m，但當(dāng)我給壓縮數(shù)據(jù)庫后發(fā)現(xiàn)，他的網(wǎng)站總占用空間不到10m...幾十倍的差距。用下面的代碼可以實(shí)現(xiàn)對access數(shù)據(jù)庫的壓縮，不會(huì)損傷數(shù)據(jù)庫的任何數(shù)據(jù)，可安全使用
[br]<% [br]path=server.mappath("mydb.mdb") [br]is97=true '這個(gè)參數(shù)決定調(diào)用方法的參數(shù)不同,若是97數(shù)據(jù)庫請?jiān)O(shè)為true，否則為false [br]response.write pa_compactdb(request.querystring("path"), is97) [br][br][br]function pa_compactdb(m_strdbfile, m_bisaccess97) [br] dim objfso, ofileb,ofilea,objengine, strdbfileb,jet_3x,sizestring [br] dim bhaserror [br] on error resume next [br] bhaserror = false [br] strdbfilea = server.mappath(m_strdbfile) [br] strdbfileb = left(strdbfilea,instrrev(strdbfilea,"\")) [br] set objfso = createobject("scripting.filesystemobject") [br][br] if objfso.fileexists(strdbfilea) then [br] set objengine = createobject("jro.jetengine") [br][br] if err.number<>0 then [br] pa_compactdb = "error:" & err.description [br] err.clear [br] else [br] set ofileb=objfso.getfile(strdbfilea) [br] sizestring="before compacted,filesize is "&(ofileb.size/1024)&"kb;
" [br] if m_bisaccess97 = true then [br] objengine.compactdatabase "provider=microsoft.jet.oledb.4.0;data source=" & strdbfilea, _ [br] "provider=microsoft.jet.oledb.4.0;data source=" & strdbfileb & "_temp.mdb;" _ [br] & "jet oledb:objengine type=" & jet_3x [br] else [br] objengine.compactdatabase "provider=microsoft.jet.oledb.4.0;data source=" & strdbfilea, _ [br] "provider=microsoft.jet.oledb.4.0;data source=" & strdbfileb & "_temp.mdb" [br] end if [br][br] objfso.copyfile strdbfileb & "_temp.mdb",strdbfilea [br] objfso.deletefile(strdbfileb & "_temp.mdb") [br] set objengine = nothing [br] set ofilea=objfso.getfile(strdbfilea) [br] sizestring=sizestring&"after compacted,filesize is "&(ofilea.size/1024)&"kb!
" [br] pa_compactdb ="your database(" & strdbfilea & ") has benn compacted successfully!
"&sizestring [br] end if [br] else [br] pa_compactdb = "your database path is wrong!" [br] end if [br] set objfso = nothing [br] set ofileb = nothing [br] set ofilea = nothing [br] on error goto 0 [br]end function [br]%>