1: The official explanation is: in a master-slave synchronization environment, REPLICATE-IGNORE-DB is used to set up libraries that do not need to be synchronized. The explanation is too simple, but there are still a lot of holes in it.Setting filter rules is not recommended on production libraries. If you want to set it, then use replicate_wild_ignore_table:mysql.%. The experiment is very simple, as followsFirst case from library: replicate-
Label:Three commonly used statements for inserting data in MySQL:Insert into indicates the data is inserted, the database will check the primary key (PrimaryKey), if there is a repeat error;Replace into represents inserting replacement data, PrimaryKey in the requirements table, or a unique index, if the database already has data, replace with new data, and insert into if no data effects are present;The Replace statement returns a number that indicates the number of rows affected. The number is
1. Specify serialization orderThe default Fastjson serializes a Java bean, which is serialized according to the alphabetical order of the FieldName, and you can specify the order of the fields by ordinal. This feature requires 1.1.42 or more versions.1 Public Static classVO {2@JSONField (ordinal = 3)3 Private intF0;4 5@JSONField (ordinal = 2)6 Private intF1;7 8@JSONField (ordinal = 1)9 Private intF2;Ten}2. Fastjson Ignore field:1 Public
SEO, simple three words believe that the majority of the webmaster every day to see the most words, we do in the usual SEO is also in constant learning SEO knowledge, the vast number of novice or veteran in the process of learning SEO whether there are some of the following problems, the feeling of SEO knowledge is very miscellaneous, a little East a hammer, West a mallet feeling, sometimes will be very confused, do not know where the study direction, sometimes encountered a problem is not clear
As Baidu's bid rankings are increasingly rigorous, many bidding rankings have been adjusted, which, although the damage to the economic interests of Baidu, but in the long run, for Baidu is there is a benefit and no harm, after all, this will attract more people through the continuous optimization of the site to promote Baidu rankings, but also more dependent on Baidu, Baidu is bound to form a single big situation, from this point of view, Baidu has earned no loss! This is now SEO optimization i
The English spelling of URLs and file addresses is personalized, so it is not possible to check Internet addresses and file addresses with a standard spelling specification. When correcting spelling in a Word2013 document, users can ignore Internet and file addresses as needed, as described in the following steps:
Step 1th, open the Word2013 document window, and click the file → options button, as shown in Figure 2013072567.
Figure 2013072567 Clic
Children's shoes with git know, general configuration. gitignore file to ignore some of the specified files in the project, of course, in addition to this way, there are other parties, the Internet has a lot of introductions, no longer repeat.
Here the actual development, recording the Unity3d in the. Gitignore configuration.
Every time we open a project we need to have such a. gitignore file, slowly we will find that the content of this configurati
Since all uppercase words sometimes have special meanings (such as a particular trademark or company name), they cannot be considered in many cases as misspelled spelling. In Word2013, you can enable "Ignore all uppercase words" so that you do not correct the spelling check, as described in the following steps:
Step 1th, open the Word2013 document window, and click the file → options button, as shown in Figure 2013072563.
Figure 2013072563 Click t
Words that contain numbers are often abbreviated words with specific meanings, such as business-to-business, C2C, etc. When correcting spelling in a Word2007 document, users can ignore words that contain numbers as needed, as described in the following steps:
Step 1th, open the Word2007 document window, and click the Office Button → Word Options button, as shown in Figure 2012040623.
Figure 2012040623 Click the Word Options button
Step 2nd, open
Original: Does SQL Server really go to update or ignore when the update value is the same as the original value?Consider the following scenario:When the update value is the same as the original value, does SQL Server really go to update or ignore it? For example:Update Tbname Set name='abc'--The original value of name is the ABCwhere ID = 1Again such as:Update Tbname Set name='abc'--The original value of na
Files in Git are ignored1. Share ignores the new. gitignore file and places it anywhere in the project directory. The. gitignore file can ignore itself. ignored files are valid only for non-tracked files and are not valid for files that have been added to the repository. The solution is to have a tortoisegit, in the form of a folder, and then right-click the folder (. settings) that you want to ignore-->tor
Reference: http://blog.csdn.net/hemingwang0902/article/details/6904205In most projects you will always have files and directories that do not require version control. This may include some compiler-generated files, *.obj,*.lst, or an output folder for executable programs. As soon as you commit the changes, TortoiseSVN will display the files in the file list of the Commit dialog box without versioning. Of course you can turn off this display, but you may forget to add a new source file.The best w
generally: only want to save a copy of the data in the database, do not want to duplicate the data (duplicate primary key, unique index), because the duplicate data is not what we want, will cause business logic trouble. But update some fields with the latest values, such as the last check time and the result of the task.The Replace statement returns a number that indicates the number of rows affected. The number is the number of rows that are deleted and inserted, andThe number of rows affecte
When using the following two methods, the field must be set to "primary key" or "UNIQUE constraint (UNIQUE )".1: Use replace into (This method uses the replacement method, which is a bit similar to deleting and then inserting)Copy codeThe Code is as follows:
Replace into SyntaxREPLACE [LOW_PRIORITY | DELAYED][INTO] tbl_name [(col_name,...)]{VALUES | VALUE} ({expr | DEFAULT },...), (...),...Or:REPLACE [LOW_PRIORITY | DELAYED][INTO] tbl_nameSET col_name = {expr | DEFAULT },...Or:REPLACE [LOW_PRIO
package informationInstalling dependencies (including require-dev) from lock fileYour requirements could not be resolved to an installable set of packages.Problem 1- Installation request for doctrine/instantiator 1.0.3 -> satisfiable by doctrine/instantiator[1.0.3].- doctrine/instantiator 1.0.3 requires php ~5.3 -> your PHP version (7.0.3) does not satisfy that requirement.Problem 2- doctrine/instantiator 1.0.3 requires php ~5.3 -> your PHP version (7.0.3) does not satisfy that requirement.- ph
[. NET Deep breath] cleans up object references. One problem is easy to ignore. net Deep breath
As we all know, an important feature of hosting code is automatic memory management, which is the garbage collection mechanism we often call. I will not repeat these advanced theories. Interested friends can read books. I have a problem with this: I don't like to talk about some theoretical things very seriously, so I don't want to talk about it much.
Gener
In Dotnet's project, the compiled binaries are placed by default in the bin and obj directories for each project, and sometimes developers accidentally commit the files of those directories to the GIT server by mistake. The Ignore file feature in Git can be very good to avoid this situation through a. gitignore file.For example, I do not want all directories (including subdirectories) in the Obj,bin folder and. user,.suo files to be synced to the GIT
Ignore files in SVNIn the project, some DLLs are generated dynamically each time the project, there is no need to commit, the project ignores it!Method One (the most old-fashioned)At each submission, manually filter the files you don't need to submit, then remove the tick,Method Two:Select the file you want to ignore--right-click-If the first one is selected: then Ignor
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