caviar 2850

log files12:00:01 am iface rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s12:10:01 AM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.0012:10:01 AM eth0 0.62 0.04 0.04 0.01 0.00 0.00 0.0012:10:01 AM eth1 0.59 0.01 0.04 0.00 0.00 0.00 0.00Rxpck/s indicates the number of packages received per secondTxpck/s indicates the number of packets sent per secondRxkB/s data volume received per secondTxkB/s data volume sent per second5. view memory conditions in free modeTotal used free shared buffers cachedMem:

clerk 7902-12-80 800 207499 allen salesman 7698 20-2 month-81 1600 300 307521 ward salesman 7698 22-2 month-81 1250 500 307566 jones manager 7839 2975-81 207654 martin salesman 7698 28-9 month-81 1250 1400 307698 blake manager 7839 01-5 months-81 2850 307782 clark manager 7839-81 2450 107788 scott analyst 7566 24-1 month-87 3000 207839 king president 17-11 month-81 5000 107844 turner salesman 7698 month-81 1500 0 307876 adams clerk 7788 1100 month-87

2975 martin salesman 1250 blke MANAGER 2850 clark manager 2450 scott analyst 3000 king president 5000 turner salesman 1500 ADAMS CLERK 1100 james clerk 950 ford analyst 3000 miller clerk 1300 has selected 14 rows. SQL> SET AUTOTRACE ONSQL> SET AUTOTRACE TRACEONLYSQL> SELECT * FROM SCOTT. emp where ename = 'James '; // scan the entire table to find information about JAMES. Required | Id | Operation | Name | Rows | Bytes | Cost (% CPU) | Time | -------

7698 blake manager 7839 2850.00 30 7782 clark manager 7839 2450.00 10 7788 scott analyst 7566 1987/4/19 3000.00 20 7839 king president 1981/11/17 5000.00 10 7844 turner salesman 7698 1500.00 30 7876 adams clerk 7788 1987/5/23 1100.00 20 7900 james clerk 7698 950.00 30 7902 ford analyst 7566 3000.00 20 7934 miller clerk 7782 1982/1/23 1300.00 10 2) calculate the average salary (SAL) of different occupations based on the JOB ): SQL>SELECTJOB,AVG(SAL)FROMEMPGROUPBYJOBORDERBYJOBASC;

1. nvl FunctionThe nvl function converts a null value to an actual value. The data type can be date, number, character, and must match: for example:Nvl (commision, 0)Nvl (hiredate, '01-JAN-87 ')Nvl (job_id, 'no manager ')Nvl (to_char (job_id), 'no manager ')Nvl can convert any data type, but the returned value of the converted data type must be the expr type of the first parameter of nvl (expr1, expr2). For example: date, number, varchar2 or charExample: Calculate the annual salary of an employe

created.SQL> create table dept as select * from scott.dept;Table created.SQL> select * from emp; EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO---------- ---------- --------- ---------- --------- ---------- ---------- ---------- 7369 SMITH CLERK 7902 17-DEC-80 800 20 7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30 7521 WARD SALESMAN 7698 22-FEB-81 1250

Oracle arithmetic operations, oracle Arithmetic In Oracle's default installation, a SCOTT user has been created. The default password is tiger, which has four tables:Employee table (EMP), department table (DEPT), salary Registration Form and bonus table. Next, many operations are completed under this user.In Oracle development, there are still arithmetic operations, relational operations, and logical operations.Oracle's arithmetic operators are not as rich as C #'s Arithmetic Operators. There a

-yyyy'), 30 );INSERT INTO EMP VALUES(7698, 'bucke', 'manager', 7839, to_date ('1-5-1981 ', 'dd-mm-yyyy'), 2850, NULL, 30 );INSERT INTO EMP VALUES(7782, 'clark', 'manager', 7839, to_date ('9-6-1981 ', 'dd-mm-yyyy'), 2450, NULL, 10 );INSERT INTO EMP VALUES(7788, 'Scott ', 'analyst', 7566, to_date ('13-JUL-87', 'dd-mm-rr ')-, NULL, 20 );INSERT INTO EMP VALUES(7839, 'King', 'President ', NULL, to_date ('17-11-1981', 'dd-mm-yyyy '), 5000, NULL, 10 );INSERT

Recently, the company has installed several DELL PE2650 and 2850 servers. The RHLE5.132 system is installed in a unified manner, while the server's SCSI hard disks are all RAID 1. The boss of the company asked for a unified detection report on hard disk I/O. He found many tools in Linux and found that iostat is the most practical. He needs to install sysstat first, that is, yum-y install sysstat; setting up yum servers in the company is not the focus

salesman 7698 20-feb-81 1600 300 307521 ward salesman 7698 22-feb-81 1250 500 307566 Jones manager 7839 02-apr-81 2975 207654 Martin salesman 7698 28-sep-81 1250 1400 307698 Blake manager 7839 01-may-81 2850 307782 Clark manager 7839 09-jun-81 2450 107788 Scott analyst 7566 19-apr-87 3000 207839 King President 17-nov-81 5000 107844 Turner salesman 7698 08-sep-81 1500 0 307876 Adams clerk 7788 23-may-87 1100 207900 James Clerk 7698 03-dec-81 950 30790

The import of large data volumes is a common problem for DBAs. Here we will discuss the import of millions of data volumes in the SQL server environment, and hope to help you. The 51cto editor recommends the topic "getting started with SQL Server. In practice, you sometimes need to import a large amount of data into the database and then use it for various program calculations. In this experiment, we will use step 5 to complete this process and record the time spent by various methods in detail.

Use of any, some, and all, and nested queries for cross-operation variance operations (Oracle) Select EMP. empno, EMP. ename, EMP. Job, EMP. Sal from Scott. EMPWhere SAL> Any (select Sal from Scott. EMP where job = 'manager '); -- As long as SAL> subquery returns the smallest Sal value.-- Break it down to see the following:Select Sal from Scott. EMP where job = 'manager ';Select EMP. empno, EMP. ename, EMP. Job, EMP. Sal from Scott. EMPWhere SAL> 2975 or SAL>

for different values only. SQL> select stddev (SAL) from Scott. EMP; Stddev (SAL) ----------- 1182.5032 SQL> select stddev (distinct Sal) from Scott. EMP; Stddev (distinctsal) ------------------- 1229.951 64. Variance (distinct | all)Covariance SQL> select variance (SAL) from Scott. EMP; Variance (SAL) ------------- 1398313.9 65. GroupIt is mainly used to calculate the number of a group. SQL> select deptno, count (*), sum (SAL) from Scott. EMP group by deptno; Deptno count (*) sum (SAL) -------

sales Chicago7566 Jones 2975 20 research Dallas7654 Martin 1250 30 sales Chicago7698 Blake 2850 30 sales Chicago7782 Clark 2695 10 Accounting New York7788 Scott 3000 20 research Dallas7839 King 5500 10 Accounting New York7844 Turner 1500 30 sales Chicago7876 Adams 1100 20 research Dallas7900 James 950 30 sales Chicago7902 Ford 3000 20 research Dallas7934 Miller 1430 10 Accounting New York 14 rows selected.In this view, EMP is a key-preserved table, b

('1-5-1981 ', 'dd-mm-yyyy'), 2850, NULL, 30 ); INSERTINTOempVALUES (7782, 'clark', 'manager', 7839, to_date ('9-6-1981 ', 'dd-mm-yyyy'), 2450, NULL, 10 ); INSERTINTOempVALUES (7788, 'Scott ', 'analyst', 7566, to_date ('19-04-1987 ', 'dd-mm-yyyy')-, NULL, 20 ); INSERTINTOempVALUES (7839, 'King', 'President ', NULL, to_date ('17-11-1981 ', 'dd-mm-yyyy'), 5000, NULL, 10 ); INSERTINTOempVALUES (7844, 'turner ', 'salesman', 7698, to_date ('8-9-1981 ', 'dd

In practice, you sometimes need to import a large amount of data into the database and then use it for various program calculations. In this experiment, we will use step 5 to complete this process and record the time spent by various methods in detail. The tools used in this experiment are VS2008, SQL server 2000, and SQL server 2008. 1 million pieces of data are imported into SQL 2000 and SQL 2008 respectively using the 5 method. The experiment environment is DELL

// close oracle# Service oracle restart // restart oracle 7. Test A. Auto Start Copy codeThe Code is as follows: Last login: Mon Nov 26 19:57:06 2012 from 10.0.0.145 [Root @ ORS ~] # Su-oracle [Oracle @ ORS ~] $ Sqlplus "/as sysdba" SQL * Plus: Release 10.2.0.1.0-Production on Mon Nov 26 20:07:33 2012 Copyright (c) 1982,200 5, Oracle. All rights reserved. Connected:Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-ProductionWith the Partitioning, OLAP and Data Mining options SQL> set l

VALUES(7566, \ 'Jones \ ', \ 'manager \', 7839, to_date (\ '2-4-1981 \ ', \ 'dd-mm-yyyy \'), 2975, NULL, 20 );INSERT INTO EMP VALUES(7654, \ 'martin \ ', \ 'salesman \', 7698, to_date (\ '28-9-1981 \ ', \ 'dd-mm-yyyy, 30 );INSERT INTO EMP VALUES(7698, \ 'blake \ ', \ 'manager \', 7839, to_date (\ '1-5-1981 \ ', \ 'dd-mm-yyyy \'), 2850, NULL, 30 );INSERT INTO EMP VALUES(7782, \ 'clark \ ', \ 'manager \', 7839, to_date (\ '9-6-1981 \ ', \ 'dd-mm-yyyy \

rather than conn_mwrite, meaning that the command parameters need to be read again. Therefore, the conn_nread breakpoint is added. (Gdb) B 2848 After debugging, you can see this Code: 2848 if (c->rlbytes == 0) { 2849 complete_nread(c); 2850

automatically shut down. Troubleshooting of dell 2850 server hard drive Troubleshooting of server hard disk faults Configuration Overview: 1. Four hard disks are used as RAID 5. 2. 2003 Operating System Fault status: Among them, the hard drive of the No. 0 plug-in has a yellow light. The first re-plugging fault is solved, and the same situation has occurred in a few days. Solution: Condition: the system must be online (in 2003 Status) for ho