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in queries1. SELECT * from Tb_grade WHERE (Foreign Languages > "High >") and Chinese >802. SELECT * from Tb_grade WHERE foreign languages > and High > 90Ten sorting, grouping statistics1. SELECT Publisher sum (amount) as total amount from Tb_book GROUP by publishing house2. SELECT title, publisher, sum (amount) as total amount from tb_book WHERE publishing house = ' People mail ' GROUP by all, title, publishing house3. SELECT Department, Gender, AVG

;#显示在1982后入职的职员 *select ename,hiredate from emp where hiredate> ' January-January-1982 '#显示工资在2000 ~2500 Employees *select ename,sal from EMP where sal>=2000sal in #如何使用like操作符% represents any 0 to more characters; _ denotes any single character; #如何显示首字符为S的员工姓名和工资 *select ename,sal from emp where ename like ' s% ';#如何显示第三个字符为S的员工姓名和工资 *select ename,sal from the EMP where ename like ' __o% ';#在where条件中使用in *select *from emp where empno in (123,213,324);#如何显示没有上级的员工 *select *from emp where Mgr is

) Mysqlfromstdscoregroup Bysname;Method Two:Select DISTINCT a.sname, (select score from Stdscore b WHERE a.sname=b.sname and B.cname= ' Java ') as ' Java ', (select SCO Re from Stdscore b WHERE a.sname=b.sname and b.cname= ' MySQL ') as ' MySQL ' from Stdscore aMethod Three:DROP procedureif EXISTS sp_score;delimiter create PROCEDURE sp_score () begin# Course name Declarecname_n VARCHAR (20); #所有课程数量DECLAREcount INT; #计数器DECLAREi INT DEFAULT 0; #拼接SQL字符串SET @s = ' SELECT sname '; SET count = (Se

The weekend was re-organized, some unreasonable places to change, feel better about themselveszabbixreport.py#!/usr/bin/python#coding:utf-8importmysqldbimporttime,datetime#zabbix Database Information:zdbhost= ' 192.168.1.100 ' zdbuser= ' Zabbix ' zdbpass= ' Zabbixreport ' zdbport=3306zdbname = ' Zabbix ' #生成文件名称:xlsfilename= ' Damo.xls ' #需要查询的key列表 [name, table name, key value, value, format, data divisible processing]keys =[[' CPU cores ', ' trends_uint ', ' system.cpu.num ', '

function that operates on a set of data that can only return one result for a set of data (multiple-line records) Multiline functions include AVG (), COUNT (), Max (), Min (), sum (), and so on. For example, select AVG (SAL), Max (Sal), Min (sal), sum (SAL), Max (HireDate), Min (hiredate) from EMP; Continuation: The use of one-line functions in Oracle's system functions can achieve many functions, such

)) | | DayFrom EMP E;--(14) Inquire about employees who work in the same job but do not belong to the same department.Select A.ename,a.job,a.deptno,b.ename,b.job,b.deptnoFrom EMP A,emp bwhere A.job=b.job and a.deptno--(15) query the details of each department and the number of departments and the average salary of the department.Select D.deptno,count (e.empno), avg (e.sal), D.dname,d.locFrom EMP E, Dept Dwhere E.deptno=d.deptnoGROUP BY D.deptno,d.dnam

active1005 trnet-default active2960 # conf t2960 (config) # int f0/12960 (config-if) # switchport access vlan 102960 (config-if) # int f0/22960 (config-if) # switchport access vlan 202960 (config-if) # int f0/32960 (config-if) # switchport access vlan 302960 (config-if) # int f0/42960 (config-if) # switchport access vlan 402960 (config-if) # endClient Verification:PC1:PC1 # ping 192.168.20.20Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 192.168.20.20, timeout is 2 seconds:U. U

highest priority is an active drop-down machine called Acitve Virtual Gateway. Other non-AVG routers provide redundancy. After a vro is elected as AVG, unlike HRSP, AVG allocates a virtual MAC address to other GLBP members.All routers in the GLBP Group forward packets,However, each router is only responsible for forwarding packets related to its own virtual MAC

Cells [3, 1] TextBox Value: = Fields! Category name. Value Cells [3, 2] TextBox Value: = Fields! Category name. Value Cells [3, 3] Sparkline SeriesValue: = Fields! Sales volume. ValueRange. Backdrop. GradientStyle: VerticalCenterRange. Backdrop. FillColor: GrayRange. Backdrop. GradientEndColor: = Theme. Colors! Accent3Range. LowerBound: = Fields! Sales volume. Value Range. UpperBound: = Fields! Sales volume. Value>

data;Group function Max,min,avg,sum,count. Max (), Min () Max minHow to show the highest wage and minimum wage for all employeesSql>select Max (SAL) "Maximum wage", min (sal) "minimum wage" from EMP; Please inquire about the highest annual salarySql>select Max (SAL*13+NVL (comm,0) *13) "Maximum annual wage", Min (SAL*13+NVL (comm,0) *13) "minimum annual wage" fromEmp AVG () averagingShow the total wage and

"%" any "_" singleSELECT * from Stu where name is like ' Zhang _ ';Regular does not support \w ...SELECT * from Stu where name RegExp ' ^a[a-z][a-z]$ ';Interval operation [NOT] between ...SELECT * from Stu where age >=18 and SELECT * from Stu where age between and 19;SELECT * from Stu where age not between and 19;[NOT] in (value 1, value 2,...)Sum sumAVG AvgCOUNT (*) countsThe parentheses can be either * or column namesIf the column name is in parentheses, the column data is not counted as a nu

Tags: 3.1 allow group window company where HTTP uses EeeOracle_ Multi-line function Multiline function min (), Max (), count (), SUM (), AVG () --1.1 Statistics of the company's maximum wage, minimum wage and total number --for null values to skip directly, do not operate --max,min,count can operate on any type Select max(sal ), Min(sal),Count(empno) From emp; selectNBSP; max (sal ), Span style= "Color:windowt

Tags: Style blog code ext http Width? Group functions: – Type and syntax – Use AVG, SUM, MIN, MAX, count– to use the DISTINCT keyword in group functions – Null values in group functions What is a group function The group function evaluates the rowset and provides a result for each group. Unlike a single-line function, group functions are used to evaluate rowsets to provide a result for each group. These collections can contain entire tab

matching--% arbitrary length string, _ any single character, escape escape characterSelect Sname,sno,ssex from student where sname like ' Liu 'Select sname from student where sname like ' Ouyang __ 'Select Sname,sno from student where sname like ' __ positive% 'Select Sname,sno,ssex from student where sname don't like ' Liu% 'Select Cno,ccredit from course where cname like ' db\_design ' escape ' \ 'SELECT * FROM course where cname like ' db\_%i__ ' escape ' \ 'Select Sno,cno from SC where grad