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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11327

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17632

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11338

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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java - How to optimize the interface to return large amounts of data?

Requirement description: The peripheral platform calls the interface to query the user's song list recommendation information based on the mobile phone number. Each user will have about a thousand pieces of recommendation information. Each piece of recommendation information includes the fields of song ID, song name, copyright ID, and audition address. . I need to query multiple tables, and each query takes about 4 seconds...

2017-05-17 10:00:33

Regarding php business logic and mysql optimization issues

There is a usr table that stores uid, username business table 1, the stored information includes field uid, username business table 2, the stored information is only uid, (multiple data in business table 2 corresponds to one piece of data in business table 1) Existing: Query Traverse business table 2, the data is an array list, and username needs to be assembled on the list to facilitate front-end display. Method one is to query the username in the database usr table based on uid for each list; method two is to traverse and query business table 1 first, and use an empty Array arr, key stores uid, corresponding

2018-07-11 11:43:28

Please ask for an eloquent related query in laravel

Table structure {code...} Now we need to query the permission_id list in the permission table based on the user_id in the Auth::user()->id where role table and then based on the role_id. . . How to write this using eloquent?

2017-05-16 16:55:49

php - Taobao order splitting table design

Our mall currently uses two tables, the ORDER table and the ORDER_DETAIL table. The ORDER table only saves user information, addresses, total prices, etc. The specific product information is stored in the DETAIL store, but now it is divided into two orders to be completed by different merchants. , how to design the database table structure based on the existing split?

2017-05-25 15:08:21

mysql - How to implement multi-table association query?

{Code...} The above are three tables in the database, related through UserID. Table A is a user login information table with LogID as the primary key; Table B stores user active status, and Table C stores user geographical location information. Now I want to get the cumulative sum of the number of other states based on the date grouping in table A. The expected return result is:...

2017-07-04 13:44:12

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JavaScript editing information usage examples based on ajax_javascript skills

Course Introduction：This article mainly introduces the usage of JavaScript to edit information based on Ajax, involving the related techniques of JavaScript operating mouse events and real-time saving of text based on Ajax. It has certain reference value. Friends who need it can refer to it.

2016-05-16 comment 0 1186

Query nearby location information based on longitude and latitude

Course Introduction：Now there is such a demand. I want to query the five nearby locations within two kilometers in the data table based on the longitude and latitude of the current location. If the query result does not include five locations, I want to expand the nearby range until five locations are found. I thought of two options: The first option is to completely use SQL statements to implement...

2016-10-22 comment 0 1752

Query nearby location information based on longitude and latitude

2016-10-22 comment 0 2582

PHP example of querying book information on the Amazon website based on isbn book number_PHP tutorial

Course Introduction：Example of using PHP to query book information on the Amazon website based on the ISBN number. Plug-in description: The plug-in searches the detailed information of the book on the Amazon website based on the 10-digit ISBN number provided. If a result is found, a two-element array is returned where the first element

2016-07-13 comment 0 1329

Determining mobile terminal browser version information based on javascript_javascript skills

Course Introduction：This article mainly introduces the implementation of judging mobile terminal browser version information based on javascript. Friends in need can refer to it.

2016-05-16 comment 0 1385

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