前兩天接到乙個需求——需要程式設計將sql server中的資料插入至oracle。資料大約有20多萬條記錄。開始的時候我採取了直接構建sql插入的方式，結果耗時太長。為了提高效能我上網找了資料。最終採用dataadapter批量插入至oracle，提高了效能。
**如下：
一，直接構建sql語句插入
vb.net
1 sw.start()
2 ''''read z02j from sql server
3 dim sqlcmd as new sqlcommand()
4 sqlcmd.connection = sqlconnection
5 sqlcmd.commandtext = "select * from z02j"67
dim sqldr as sqldatareader
8 sqldr = sqlcmd.executereader()
910
dim cmdinsertz02j as new oraclecommand()
11 cmdinsertz02j.connection = oraconnection
12 cmdinsertz02j.commandtext = buildsqlstatement(sqltype.insert,"z02j")
14 dim plantlever, material, oldmaterialnum, materialdescription as object
15 while sqldr.read()
16 plantlever = readsqldatareader(sqldr, 0, "")
17 material = readsqldatareader(sqldr, 1, "")
18 oldmaterialnum = readsqldatareader(sqldr, 2, "")
19 materialdescription = readsqldatareader(sqldr, 3, "")
20 ''insert to oracle table z02j
21 cmdinsertz02j.parameters.addwithvalue(":plantlever", plantlever)
22 cmdinsertz02j.parameters.addwithvalue(":material", material)
23 cmdinsertz02j.parameters.addwithvalue(":oldmaterialnum", oldmaterialnum)
24 cmdinsertz02j.parameters.addwithvalue(":materialdescription", materialdescription)
25 cmdinsertz02j.executenonquery()
26 end while
27 sw.stop()
28 loger.info("reading z02j form sql sever used", sw.elapsed.totalseconds.tostring())
二，採用dataadapter實現批量插入
vb.net
1 sw.start()
2 ''''read z02j from sql server
3 dim sqlcmd as new sqlcommand()
4 sqlcmd.connection = sqlconnection
5 sqlcmd.commandtext = "select * from z02j"67
dim sqldr as sqldatareader
8 sqldr = sqlcmd.executereader()
910
dim cmdinsertz02j as new oraclecommand()
11 cmdinsertz02j.connection = oraconnection
12 cmdinsertz02j.commandtext = buildsqlstatement(sqltype.insert,"z02j")
14 dim dtsqlz02j as new datatable
15 dtsqlz02j.columns.add("plantlever")
16 dtsqlz02j.columns.add("material")
17 dtsqlz02j.columns.add("oldmaterialnum")
18 dtsqlz02j.columns.add("materialdescription")
20 dim plantlever, material, oldmaterialnum, materialdescription as object
21 while sqldr.read()
22 plantlever = readsqldatareader(sqldr, 0, "")
23 material = readsqldatareader(sqldr, 1, "")
24 oldmaterialnum = readsqldatareader(sqldr, 2, "")
25 materialdescription = readsqldatareader(sqldr, 3, "")
26 dtsqlz02j.rows.add(plantlever, material, oldmaterialnum, materialdescription)
27 end while
28 sw.stop()
29 loger.info("reading z02j form sql sever used", sw.elapsed.totalseconds.tostring())
31 sw.start()
32 dim orada as new oracledataadapter()
33 orada.insertcommand = cmdinsertz02j
34 orada.insertcommand.parameters.add(":plantlever", oracletype.char, 255, "plantlever")
35 orada.insertcommand.parameters.add(":material", oracletype.char, 255, "material")
36 orada.insertcommand.parameters.add(":oldmaterialnum", oracletype.char, 255, "oldmaterialnum")
37 orada.insertcommand.parameters.add(":materialdescription", oracletype.char, 500, "materialdescription")
39 orada.insertcommand.updatedrowsource = updaterowsource.none
40 orada.updatebatchsize = 20
'''adjust the batch size based on testing result
42 orada.update(dtsqlz02j)
43 sw.stop()
44 loger.info("insert to oracle used", sw.elapsed.totalseconds.tostring())
在我的環境中批量插入24萬筆記錄用時大約260s左右。
貌似sql server中。net驅動程式提供了sqlbulkcopy類來提高大量資料匯入的效能。有需要的朋友可以查
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