Specify the index statement when Oracle queries or deletes the query.
You can specify the index statement when querying.
Select/* + index (tb_alias ix_g_cost3 )*/Tb_alias .*From g_cost tb_aliasWhere item_two = 0And flight_date> = to_date ('20140901', 'yyyymmdd ')And flight_date
You can also specify the index statement when deleting an index.
Delete/* + ind
When commissioning the Andorid project on a mobile phone today, I found that the console printed "warning:application does not specify a API level requirement!" The warning message is as follows: Although it does not affect the normal operation of the project, but to find out why, the Internet to check the cause of the warning, originally created the project when the Androidmanifest.xml file does not specify
When you perform a Maven install package, the following error message appears:Ignoring unused library classes...java.io.ioexception:you has to specify '-keep ' options for the shrinking step.[Proguard] Ignoring unused library classes...java.io.ioexception:you has toSpecify'-keep 'Options for theShrinking step. [Proguard] Original Number ofLibrary classes:19765[Proguard] Final Number ofLibrary classes:19765[Proguard] Setting Target versions ... [
Jscs:please specify path to ' Jscs ' package1.webStrom tips:Jscs:please specify path to ' Jscs ' package, this error type:2. Workaround:Webstorm file–> settings–> Language frameworrks–> javascript–> Code quality tools–> respectively open JsLint , Jshint Closure Linter, Jscs, ESLint, their Enable properties are canceled, click on the bottom right corner ' Apply ', ' OK ' on itJscs:please
Tags: doc detail mongod compress without tables ring zip tinCorrect BACKUP statement: mongodump-h 172.27.137.26:36137-d ssdb-o f:\data\ssdb170505-u=administrator-p=qqddd.222--authenticationDat Abase=admin for the first time using mongodump-h 172.27.137.26:36137-d ssdb-o f:\data\ssdb170505-u=administrator-p=qqddd.222 When the backup times are wrong:Failed:error connecting to DB Server:server returned error on SASL authentication step:authentication Failed. Need to add--authenticationdatabase admi
In MySQL, when writing SQL statements, you may encounter the error of you can ' t specify target table ' table name ' for update in FROM clause, which means that you cannot select some values from the same table before the UPD Ate this table (in the same statement).1. How did the problem arise?Data preparationCreatetablet_person (Pidintprimarykeyauto_increment,pnamevarchar (20)) ; Insertintot_person (PName) values (' Chen Yi '); Insertintot_person (pN
--warning:skipping The data of table mysql.event. Specify the--events option explicitly.Mysqldump-uroot-pxxxxx--all-databases > All.sqlMySQL prompts "-warning:skipping the data of table mysql.event when exporting the database with mysqldump. Specify the--events option explicitly. "Because the mysqldump default is not to back up the event table, only the addition of--events will resolve the addition of--even
Tags: ref RAM validation conf lftp Click Username Col fileLFTP Connect FTP In the script can beLftp-c "open Username:[email protected]:p ort; ls/friso/20180822/click/mobile/success | Wc-l "Lftp Usename:[email protected]:p ort-e "ls/friso/20180823; ByeLftp Connect sftp and specify private keyLftp-e ' Set sftp:auto-confirm yes;set sftp:connect-program ssh-a-x-i @ Host;mirror-er files:' If password does not fill the word will not skip verification,
Self-implemented simple AOP (2) Introduce Attribute to specify the enhancement object for the method, aopattribute
Preface: Self-Implementation of simple AOP (I)
In the previous article, I briefly introduced the implementation of AOP. Next, Attribute is introduced to specify the enhancement object for the method to implement a simple AOP.
Note: It specifies the enhancement object, "object", that is, Attrib
C language: implement a function, print the multiplication table, and specify the number of rows and columns in the table.Implement a function to print the multiplication table. specify the number of rows and columns in the table, input 9, output 9*9, OUTPUT 12, and output 12*12. Program:
# Include
Result: Enter the rows in the multiplication table: 121*1 = 12*1 = 2 2*2 = 43*1 = 3 3*2 = 6 3*3 = 94*1 = 4 4*
phone's time, which passes through the real time, even in the dormant state, and the time is calculated.(2) Periodic execution of an operationIntent Intent =NewIntent (Main. This, Alarmreceiver.class); Intent.setaction ("repeating"); Pendingintent Sender=pendingintent.getbroadcast (Main. This,0, Intent,0);//Start TimeLongFirstime=Systemclock.elapsedrealtime (); Alarmmanager am=(Alarmmanager) Getsystemservice (alarm_service);//5 seconds, one cycle, no stop sending broadcasts.Am.setrepeating (Ala
Lt ;? Php port sniffer-you can specify the website and port and return the sniffing result functionhttp_request ($ server, $ port) {$ data quot; $ query quot; HEADHTTP1.0 quot; $ fpfsockopen ($ serve
// Php port sniffer-you can specify the website and port
// Returns the sniffing result
Function http_request ($ server, $ port ){
$ Data = "";
$ Query = "HEAD/HTTP/1.0 ";
$ Fp = fsockopen ($ server, $
This example describes Python finding a method that specifies a file with the same content. Share to everyone for your reference. Specific as follows:
Python code to find files that specify the same content, you can specify multiple directories at the same timeCall mode: Python doublesdetector.py c: \;d \;e:\ > Doubles.txt
# Hello, this script was written in python-http://www.python.org# doublesdetector.py
Phpfilter_var filters specified data. Define and use the filter of the filter_var () function and the filter specified by a variable. A success or a failure of FALSE is returned. Syntax filter_var (variable, filter, opti definition and usage
The filter of the filter_var () function and the filter specified by a variable.
A success or a failure of FALSE is returned.
Syntax
filter_var(variable, filter, options)
Variable: required. Filter: Optional. Specify
This article describes how to specify the View Cache in URLconf under the Django framework. Django is the most popular among the various Python web frameworks, if you need it, you can see that the view is coupled with the cache system, which is not ideal in several aspects. For example, you may want to reuse the View function on a site without caching, or you may want to publish the view to those who do not want to use it through caching. The solution
This time to bring you how to take NumPy array to specify the row and column, take numpy array to specify the column of attention to what, the following is the actual case, together to see.
The operation on the NumPy array is a bit cumbersome, but there is no way.
For example
A = [[4,5,6], [[7,8,9]]
Take a of 2 3 rows, 1 2 columns
c=[1,2] D =[0,1]
If written as
b = a[c,d] Output: [4 8]
Take the data from t
Recommendation 35: Use default to specify an initial value for a generic type variableSome algorithms, such as the Find algorithm for generic collection list Public T func() { null; return t; }Cannot convert null to type parameter ' T ' because it may be a non-nullable value type. Consider using "Default (T)" instead. Public T func() { 0; return t; }The type "int" cannot be
Fire Station Building Institute (Bkjia.com)LinuxDocumentAs we all know, the default search paths for Linux dynamic libraries are/lib and/usr/lib. After a dynamic library is created, it is generally copied to these two directories. When a dynamic library is required for program execution and the dynamic library is not loaded into the memory, the system will automatically go to the two default search paths to find the corresponding dynamic library file, then load the file to the memory so that t
Can you tell me how to specify the serial port output by the terminal on the Linux ARM (just give me a prompt)-General Linux technology-Linux technology and application information? The following is a detailed description. Half of the development boards running Linux on ARM have a dedicated serial port used to output terminal information. This serial port is generally configured with 115200 N 1. I would like to ask you to
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