摘要： Disk file operations I/O This event is used to wait for disk file operations (for example, open, close, seek, and resize). It is also used for miscell 阅读全文

摘要： #!/usr/perl/bin/perl open(FHD, "C:\\wflogs\\WorkflowServerLog.txt") || die("can't open the file\n"); open(OFH, ">c:\\wflogs\\AverageTimeLog.txt") || d 阅读全文

摘要： #!/usr/perl/bin/perl#open(FHD, "c:\\test\\test.txt") || die("cna't open the file\n"); my %hash; $hash{1} = {name=> 'mm1', age=> 18, sex=>'female'}; $h 阅读全文

摘要： About Decimal value and precision:Decimal number Decimal System. Decimal 16bytes valus:-79228162514264337593543950335to 79228162514264337593543950335  阅读全文

摘要： When we use ODBC connect Sybase DataBase, if there is some null values.we need set ansinull to 0. For ODBC connection, there exists connection.command 阅读全文

摘要： Access type misssmatch error join on different typessuch as tbl_1 LEFT JOIN tbl_2 AS counter ON tbl_1.nameID = counter.compIDSybase set password probl 阅读全文

摘要： Today, When i come to company,check the result what i run yesterday. but there some error. as follow:ORA-01691 unable to extend lob segment string.str 阅读全文

摘要： create directory mydirectory as 'd:\data\dumpdir';select * from dba_directories;grant read,write on directory mydirectory to myusername;expdp myuserna 阅读全文

摘要： 运行服务器的软件配置情况Function Name Version Port LicenseOperate System Suse or Redhat(Fedora Core) Stable is ok freeWebServer Apache 2.2.22 (2 above ) 80 free P 阅读全文

摘要： Introduce去年select count 和 select data 留下的问题优化器如何选择最佳路径 ？ 如何计算代价 ？ 正文i/o 一般是大头 cpu 一般比较小 表内 full table scan = blocks = mbrc(multi-bolck read count) blo 阅读全文