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RSS订阅转载 Methods for processing duplicate records
The measurement of duplicate is the values of two or more records for columns(prod_id,cust_id,time_id) are the sam...
2012-07-13 13:55:41
189
转载 sql loader Case Study 2: Loading Fixed-Format Fields
Case 2 demonstrates:A separate datafile. See Specifying Datafiles.Data conversions. See Datatype Conversions...
2012-06-29 15:57:50
159
转载 sql loader Case Study 1: Loading Variable-Length Data
Case 1 demonstrates:A simple control file identifying one table and three columns to be loaded.Including dat...
2012-06-29 15:54:37
199
转载 split the segment by rowid for parallel process
select grp, dbms_rowid.rowid_create( 1, data_object_id, lo_fno, lo_block, 0 ) min_rid, dbms_rowid....
2012-06-26 14:00:48
142
转载 oracle 11g impdp 中断之后，继续执行的方法
$ impdp system/cloudwave1 schemas=icopy directory=dir_dump file=icopy20120619.dmp执行到一半，由于机器要做性能测试，所以暂停任务。按CTR...
2012-06-21 14:37:40
2655
转载 Statement和PreparedStatement中char 类型字段的判断不同。
create table testchar(c1 char(10));insert into testchar(c1) values('a');--没有空格select * from testchar where c1='a'-...
2012-06-14 09:53:20
239
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