avg or norton

/*The grouping function can no longer have normal columns in the SELECT clause, unless the column gives all the null values in group by to be grouped into a group filter SELECT from WHERE GROUPBY having an by-clause*/--find out the average salary for each jobSELECTJOB,AVG(SAL),MAX(SAL),MIN(SAL) fromEmpGROUP byJOB; SELECT MAX(SAL) fromEMP;SELECTDEPTNO,AVG(SAL) fromEmpGROUP byDEPTNO;--find the average salar

Tags: Oracle having group functionsGrouping functions: Acts on a set of values and returns a value to a set of data;Use of grouping functions:Commonly used grouping functions:AVG (averaging), sum(sum), min(minimum), Max(max), Count(Total), Wm_concat ( Row to column )Example :Select COUNT (Distinct deptno) from EMP;row to column: select deptno Department number , Wm_concat (ename) Department of the employee's name from the EMP Group by DEPTNO;----------------------------------------------------g

D.deptno,d.dname,d.loc,e.empno,e.enameFrom Dept d,emp E where D.deptno=e.deptno (+)(28) To inquire all employees and their department information, including those who do not belong to any department of staff.Select D.deptno,d.dname,d.loc,e.empno,e.enameFrom Dept d,emp E where D.deptno (+) =e.deptno(29) To inquire the names of all employees who work for clerk and their departments.Select E.ename,d.dname from emp e,dept D where e.deptno=d.deptnoand e.job= ' clerk '(30) To inquire the minimum wage

; SELECTSNAME, MAX (case cnamewhen 'Java' THEN (casewhen score-(select avg (SCORE) from stdscore where CNAME = 'Java')> 20 THEN 'excellent 'When SCORE-(select avg (SCORE) from stdscore where CNAME = 'Java')> 10 then' good 'When SCORE-(select avg (SCORE) from stdscore where CNAME = 'Java')> = 0 then' normal 'else' poor 'end) END) JAVA, MAX (case cnamewhen 'mysql

This article focuses on the information G1 GC log printing in the case of the -xx:+printgcdetails option. (Note: This article assumes that the reader has some idea of the basic principles of the G1 algorithm.)Below is a section of the G1 garbage collector related log information0.522: [GC Pause (Young), 0.15877971 secs] [Parallel time:157.1 MS] [GC Worker Start (MS): 522.1 522.2 522.2 5 22.2 avg:522.2, min:522.1, max:522.2, diff:0.1] [Ext Root scann

probably the easiest and simplest way to ping a local host $ Ping 0 Ping 0 (127.0.0.1) 56 (84) bytes of data.64 bytes from 127.0.0.1: icmp_seq = 1 TTL = 64 time = 0.024 Ms ^ C Ping localhost using name $ Ping localhostping localhost (127.0.0.1) 56 (84) bytes of data.64 bytes from localhost (127.0.0.1): icmp_seq = 1 TTL = 64 time = 0.051 ms64 bytes from localhost (127.0.0.1 ): icmp_seq = 2 TTL = 64 time = 0.055 Ms ^ C --- localhost Ping statistics --- 2 packets transmitted, 2 received, 0% pack

1. Install Mysqlsla The code is as follows Copy Code wget http://hackmysql.com/scripts/mysqlsla-2.03.tar.gzTar zvxf mysqlsla-2.03.tar.gzCD mysqlsla-2.03Perl makefile.plMakeMake install Perl makefile.pl will complain, according to the error content Baidu has relevant information, nothing but yum install some things 2. Using Mysqlsla syntax The code is as follows Copy Code Slow log:mysqlsla-lt Slow Slow.logGeneral LOG:MYSQLSLA-LT

Tags: topic insertion percentage distinct like will design type learning (1) distinguish between having and where: The HAVING clause enables you to specify a filter condition that controls which groups in the query result can appear in the final result. The WHERE clause imposes conditions on the selected column, while the HAVING clause imposes conditions on the groups produced by the GROUP BY clause. The following SQL statements are based on the MySQL5.6.30 version.1. Check the number of all

Tags: strong des order table last syntax nts out intoGrouping Functions , multi-line functions Summary of non-null data Only Lieri the null value first. Grouping is not required Sql> Select COUNT (*), sum (Salary), AVG (Salary), min (Salary), Max (salary) from employees; sql> CREATE TABLE t1 (x int); sql> INSERT INTO T1 values (null); sql> INSERT INTO T1 values (1); Sql> commit; Sql> Select COUNT (*) from T1; Sql> select COUNT (x) from T1; Sql> sele

Label:1. Use logical operation symbolsQuestion: Query for wages higher than 500 or job manager employees, but also to meet their initials in uppercase J?SELECT * from emp where (Sal > $ or job = ' MANAGER ') and ename like ' j% '; 2. Use the ORDER BY clause default ASCQuestion: How do I display employee information in order of low to high wages?SELECT * from emp order by Sal;Problem: The employee's wages are sorted in descending order by department number ascendingSELECT * from emp order by dep

1. Use logical operation symbolsQuestion: Query for wages higher than 500 or job manager employees, but also to meet their initials in uppercase J?SELECT * from emp where (Sal > $ or job = ' MANAGER ') and ename like ' j% ';2. Use the ORDER BY clause default ASCQuestion: How do I display employee information in order of low to high wages?SELECT * from emp order by Sal;Problem: The employee's wages are sorted in descending order by department number ascendingSELECT * from emp order by deptno, Sal

We use-P 90 to assign to Cyclictest First level 90, using the-m parameter to lock memory allocations, using the-C 0 to specify the default monotonic clock,-I 200 to specify a loop of 200US, combined with-l 1000000 for a total of 1 million loops, and-N for using nanosleep instead of simple SLE Ep,-q to not print instant messages at run time, the-H 100 is a total of 100 information in the final result. -----#/dev/cpu_dma_latency set to 0us-------------(below are the information that is printed af

courses, the average score is 73.67. Note that transaction 1 is not committed at this time. private static Double ReadAverageMarksByTransaction1 () {return (double) executescalar ("Select AVG." As Avgmark from SC WHERE (id = 1) ");} private static int ReadTotalCoursesByTransaction1 () {return (int) executescalar (' Select COUNT (*) as Num from SC WHERE (id = 1) "); Private static Object ExecuteScalar (String command) {Console.WriteLine ("--Execute co

= 0.0 bytes bytes, 0.0 bytes = 0 avg Size, 0 DPS, 0 M b/S[13:17:17,678] [INFO] [Metrics.sink.plain] [pool-3-thread-1] 7 minutes seconds = 479335 ms, submitted = 0, succeeded = 0, failed = 0, 0 = 0.0 bytes bytes, 0.0 byt ES = 0 avg size, 0 DPS, 0 mb/s[13:19:40,589] [INFO] [Metrics.source.plain] [pool-3-thread-1] totalrows = 0, 8 minutes seconds = 524264 ms, 0 = 0.0 bytes bytes, 0.0 bytes = 0

' 10. Through the Intersect set operation, query the employee information for which the salary is greater than 2500 and work as analyst. SELECT * from scott.emp where sal>2500 intersect select * from scott.emp where job= ' ANALYST 11. Use the minus collection to query for wages greater than 2500, but work is not employee information for analyst. SELECT * from scott.emp where sal>2500 minus select * from scott.emp where job= ' ANALYST '; 12. Check all employee information for wages higher than

Oracle grouping and grouping functions 1. summation and averaging 1. What is a group function is the multi-row function we mentioned earlier. It is mainly used for table operations. Because only tables have multiple rows of data. The following uses the SUM and AVG functions as examples to describe the features of group functions. Www.2cto.com 2. SUM sum function gyj @ OCM> select SUM (salary) from t1; SUM (SALARY) ----------- 315888 when ORACLE execut

Grouping functions of oracle reinforcement exercises 1. Show jobs with an average salary of> 2000 Select job, avg (sal) from emp group by job having avg (sal)> 2500; 2. Calculate the average salary of over 2000 jobs and the average salary of over 3000 jobs Select job, avg (sal) From emp where sal> 2000 group by job having avg