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, PRICE * 2 AS DOUBLE FROM PART WHERE PRICE * 2 In this way, we get: PNAME | DOUBLE--------+--------- Screw | 20 Nut | 16 Bolt | 30 Note that the double column after the keyword as is the new name of the second column. This technique can be used to assign each element in the target list a new title displayed in the result column. This new title is usually called an alias. This alias cannot be used elsewhere in the query.1.4.1.2. Joins (connection) The following example s

column after the keyword as. This technique can be used for each element in the target list, giving them a new caption to display in the result column. This new title is often called an alias. This alias cannot be used elsewhere in the query. 1.4.1.2. Joins (connection) The following example shows how the connection is implemented in SQL. To connect three tables Supplier,part and sells on a common attribute, we typically use the following stateme

Today, I will introduce VBS in general, hoping to give you an intuitive impression. In addition, the explanation is combined with the shortcut wizard tutorial (made by Li Yue) on the button official website to help you understand this stuff. I. Overview To allow computers to do things, they must be given instructions. The original commands were very complicated. They were all things such as 0011001. Later, the commands were simplified and closer to human languages. VBS (Microsoft (R) Visual Basi

Below we will introduce you to 5 to protect your iphone's shell, they can be broken, broken and waterproof and so on. 1.OtterBox symmetry Series Reason for recommendation: Don't take up the land in your pocket. This is a iPhone6 plus mobile phone shell, currently priced at 49.95 U.S. dollars (about 307 yuan). Solidity: Symmetry's slim protective shell is enough to cling to the phone to protect it. Overall, the phone's

First, look at two pieces of code. By inheriting the thread class classmythreadextendsthread{ privateintticket=10; private stringname; publicmythread (stringname) { this.name=name; } publicvoidrun () { for (inti=0;i A window to sell tickets---->10 A window to sell tickets---->9 window second selling tickets----the window to sell tickets---->8 A window to sell tickets---->7 window to sell tickets---->6 Third window to sell tickets----G T;10 a window to sell tickets---->5 A window to sell t

ensure continuous service, the two brothers to discuss a few ways:Method One: Active/standby (Active/Standby mode)Peacetime boss Business, the second of this time at home waiting, once the eldest brother can not do business, the dick on the top, this is called Active/standby.Method Two: Active/passive (Active/passive mode).Peacetime boss Business, the second this time on the side of the helper, once the eldest brother can not do business, the second immediately on top, this is called active/pas

1. Best time to Buy and Sell Stock II1 classSolution {2 Public:3 intMaxprofit (vectorint>prices) {4 if(Prices.size () 1)//prices.size is unsigned int5 return 0;6 intPro =0;7 for(intI=0; I1; i++)8 {9 if(prices[i+1] >Prices[i])TenPro + = prices[i+1]-Prices[i]; One } A returnPro; - } -};The actual stock is impossible to know after today's fares, otherwise it will be based on the trend, every t

0.992 54914 55734 6409.41qec penguin chain 1.535 1.5351 1.819 1.828 1.5214 41824 67476 7759.74 nhgh ninghong orange red 41.5088 41.5088 46.0 877 46 41 37438 5.37etc ethereclassic 900 755.4067 899 900 711.11 29403 3381.35xas ashboard 41.3211 41.4111 47.9999 47.339 41.3211 805 34672 3987.28lsk LISK 148.98 120 148.89 148.98 148.98 1489 90.1258 171.24ppc spot price 85.0557 107.9999 90.1258 90.1258 404 4 46.46 Computing arbitrage #3. calculate the arbitrage space print ("\ n [arbitrage space]") pri

, shielding its special meaning: Echo \ *: output is *; otherwise, output is directory Octal output: ECHO-e "this is \ 0100": This is @ 5. the expr command is generally used as an integer, but can also be used as a string. The general format is:1) expr argument operator argumentFor example, the expr 10 + 10 output is 20.Expr 10*10: The output is a syntax error. Here, you must use the backslash: expr 10 \ * 10 to output 100.Expr $ leeboy = "9": determines whether leeboy is 9. 1 is returned correc

characters (a-Z, a-Z, 0-9 or _). Note that \ W does not match non-English characters, such as é, N or C. It is different from.VaR pattern: Regexp =/^ \ W/VaR STR: String = "A Bug"VaR STR: String = "0 bugs"VaR STR: String = "A Bug"VaR STR: String = "_ bug"Trace (STR, "is valid:", pattern. Test (STR); _ bug is valid: True17. \ W usage: match any character except word characters.VaR pattern: Regexp =/^ \ W/VaR STR: String = "worms"Trace (STR, "is valid:", pattern. Test (STR); Bug is valid: True18.

knowledge.The stall owner praised the old lady, and said that his fruit every day is a time to buy, every day to sell light, to ensure that fresh (will be single-hit, so that customers steadfast), if eaten well, let the Old lady come back (build customer stickiness).The old lady was praised by the stall owner, saying that if it was good to eat, let friends buy it. Carrying fruit, satisfied to go home.So, what does the sale sell?Stranger sells courtes

directly in renminbi, that is, a certain number of foreign currencies in the amount of RMB listed.Each foreign currency is published 3 kinds of quotations, namely the foreign exchange bid price, the foreign exchange price, the cash purchase price.The selling price is the price at which the bank sells the foreign currency to the customer, which is the price quoted by the customer at the bank.The purchase price is the bank to the customer to buy foreig

brothers discuss several methods: Method 1: In normal times, the boss is doing business. The second child is waiting at home. Once the boss cannot do business, the second child comes out to the top. This is called active/standby. Method 2 Method 3: at ordinary times, the boss sells steamed buns, and the second child also sells soy milk. The old one has a big problem. The second child

of the functions of the system, the APIS you create for the new class will be much simpler than the APIs of the original system. (2) You want to encapsulate or hide the original system. (3) You want to use the functions of the original system and add some new functions. (4) The cost of writing new classes is less than what everyone learns to use or will need to maintain the original system in the future.Ii. Example The following uses shopping in a store as an example. In general, if we want to

is still "non-sales account" status. OCS users, then, will be all "posted" status, the balance is-50 yuan. According to the rules of the financial side, the arrears can not be classified as income, in the Ofcs, the statistics "has been sold" the bill can, OCS, then need to subtract 50 yuan negative balance, this time the problem comes, the financial account when the need to have accounts, which 50 yuan what accounts?The general practice is directly listed as "unpaid" accounts, which is not allo

Because of the 90th anniversary of the coherent Cute patchouli (C.C.P), Kawashiro Nitori decides t o buy a lot of rare things to celebrate. Kawashiro Nitori is A Very shy Kappa (a type of water sprite that live in rivers) and she lives on Youkai mountain . Youkai Mountain is A dangerous place full of Youkai , so normally humans is unable t O is close to the mountain. But because of the financial crisis, something has changed. For example,, Youkai Mountain becomes available for to