query:SELECT * from scott.emp t1 inner joins scott.dept T2 on T1.deptno=t2.deptno where t2.dname= ' SALES ';Note the changes in both the rows and columns of the two implementations.5. Check the names of all employees and their immediate superiors.Select T1.ename as employee name, T2.ename Manager name from Scott.emp t1,scott.emp T2 where t1.mgr=t2.empno;6. Inquire about all employees whose entry dates are earlier than their superiors.Select T1.ename as employee name, T2.ename Manager name from
Algorithm:Has an integer valueFor example, 42, its dividend can be 1, 2, 3, 6, 7, 14, 21, 42.The square of its dividend elements is: 1, 4, 9, 36, 49, 196, 441, 1764.The value of these squares is added to 2500.and 2500, which can be squared by an integer, is the square of an integer 50. This is the value we are looking for.
If an integer value is given in the [M,n] range, we can get this sequence:List_square
Default 3com bay switch vro account and password
Information Source: Niu Ge3COM maintains the devices they sell in a strange way. Any of the following passwords are the highest permissions and can be set freely.CoreBuilder 6000/2500-username: debug password: synnetCoreBuilder 3500 (Version 1.0)-username: debug password: synnetCoreBuilder 7000-username: tech password: techSuperStack II Switch 2200-username: debug password: synnetSuperStack II Switch 2
the new set.
-- Intersection: only elements of both sets are retained in the new set.
-- Difference set: only elements that you do not have are saved in the new set.
-- Difference set
SELECT ename, job, sal FROM emp WHERE job = 'manager' minus select ename, job, sal FROM emp WHERE sal> 2500;
-- Common Union
SELECT ename, job, sal FROM emp WHERE job = 'manager' union select ename, job, sal FROM emp WHERE sal> 2500
operators are invalid. 3. If the selection list contains an expression, you must specify the column alias for it. (1) The UNION operator is used to obtain the UNION of two result sets. When this operator is used, repeated rows in the result set are automatically removed. The results in the first column are sorted. SQL code 1. SELECT ename, sal, job FROM emp WHERE sal> 2500 union select ename, sal, job FROM emp WHERE job = 'manager'; (2) the union all
the 7000 series router is located on the vro processor board, and the 4000 ROM chip is located on the motherboard. In versions 7000 and 4000, the ROM chip can be upgraded to the new IOS version. In the 2500 router and 1000 Series LAN extenders, the ROM chip cannot be upgraded and only contains one operating system with limited functions. Only the routing function is available. In vrouters of the 2500 serie
believes that as long as they have enough vocabulary, even if they do not have much grammar knowledge, foreign language learners can better understand and express in foreign languages.The linguistics Wilkins has one sentence.Famous saying: No syntax can only convey a small amount of information, and nothing can be conveyed without vocabulary. According to a survey conducted by Laufer, if a foreign language learner has a vocabulary of 5000, the reading accuracy rate can reach 56%, the vocabulary
they correspond, that is, the callback that the method triggers, the callback that will trigger resolve done reject fail , and notify the callback that will trigger progress .Look directly at the code:var wait = function (ms) { var DTD = $. Deferred (); SetTimeout (Dtd.resolve, MS); //setTimeout (Dtd.reject, MS); //setTimeout (dtd.notify, MS); return dtd.promise (); //here you can also return directly to Dtd};wait (2500). Done (function () { Span
component?A: There are two reasons. The first reason is that the number of revolutions of the heating film is not synchronized. You can apply some silicon paper to the heating film to synchronize the number of revolutions. Second, check the paper sensorQ: Is founder 280E the same as founder 210,220?A: Like founder 200 and Xerox P8E, they are different from those of founder 210 and 220!Q: Is the drum cores of Lenovo 2500 and 2312 universal?A: Our comp
);
SetTimeout (dtd.notify, MS);
return Dtd.promise (); The DTD can also be returned directly here
;
Wait (2500). Done (function () {
console.log (' Haha, teacher, you can keep rite waiting ');
}. Fail (function () {
console.log (' failed ');
}). Progress (function (res) {
console.log (' Wait ... ');
});
We see that the above code, in the Wait function, returns a Promise object, not a deferred object.
You know, promise objects are not res
Personal website traffic and the relationship between money can be calculated every month to make money, the following data for reference only, the listed data for general statistics, the site does not include illegal sites, such as * * site, excluding the sale of products of commercial sites, is purely in various types of personal sites.
Website daily traffic to do every month to make the money
1000IP 200-300 RMB
(1000IP a day, for like a site, a bit of content site, in 20 days it is easy to do
Network is inseparable from the password, as a network administrator to remember more than one router password, if the router password forgotten, we need to set up a router to restore the password.
Router password recovery has a common, that is, let the router start to skip the configuration file, direct startup, and finally change the password, and finally achieve the purpose of recovery password.
First, 2500 series Cisco router password recovery
Read-only memory (ROM) contains a copy of the iOS used by the router. The ROM chip of the 7000 series router is located on the Router processor board and 4000 of the ROM chip is on the motherboard. In 7000 and 4000, the ROM chip can be upgraded to a newer version of iOS. In the 2500 router and 1000 series LAN Extender, the ROM chip cannot be upgraded and contains only a very limited operating system, with only routing features. In the
() can be used when vertical statistics are required.Query the number of records in the EMP table:Select Count (*) as from EMP;
To inquire about the number of commissions in the EMP table:
Select Count as from EMP;Note that because the Comm column is given in the count () function, only the number of non-null rows in the Comm column is counted.
To inquire about the number of people earning more than 2500 in the EMP table:
from (SELECT * from EMP) A1 where rownumVi. Merging queriesOverview: Sometimes in real-world applications, in order to merge the results of multiple SELECT statements, you can use the set operation symbol Union,union All,intersect,minus.1. UnionDescription: This operator is used to obtain a set of two result sets. When the operator is used, duplicate rows in the result set are automatically removed.Case: Sql>select ename,sal,job from EMP where sal>2500
discontinuous and not unique numbers within the group.--dense_rank () produces a continuous, uniqueSELECT Ename,deptno,sal, Dense_rank () over (PARTITION by Deptno ORDER by Sal DESC) RANK from EMP;--Collection operation: The set, combining all the elements of the two set into a collection of common and full-set.--Full union: will produce duplicate elements, two elements of the set, will appear in the new collection after merging two times.--Intersection: The new collection retains only the elem
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