count query

First: Using the Page class and the Limit method$User = M (' User '); //Instantiate User Object$count = $User->where (' Status=1 ')->count (); //Query the total number of records that meet the requirements$Page = new \think\page ($count, 25);

Mybatis paging plug-in PageHelper correct method of use (there are two articles on the Internet that are not scientific enough ),This afternoon, in the Mybatis project, implement paging. Because I joined the project later, the Leader used the

{Code...} cannot get quantity {code...} can get data $ Count = $ order-> where ($ con)-> join ("left join x_goods ON x_goods.goods_id = x_order.order_goodsid")-> order ("order_createtime desc ") -> group ("order_no")-> count (); // query the total

How can I select two fields for the thinkphp filter ~~ Reply to discussion (solution) Become a sofa and wait for the answer from your master brother ~~ $ Model-> where ($ condition)-> select ();$ Condition: just like normal SQL, you can

thinkphp text filter fields are in a table Program code Public Function index () {$Data = M (' Zhaopin '); Instantiate data ObjectImport (' ORG. Util.page ');//Import page-out class$count = $Data->where ($map)->count ();//query satisfies the

The example of this article is about how to thinkphp the first page pagination and the search page to keep the condition paging when the search is implemented. Share to everyone for your reference. The implementation methods are as follows: In

MySQL is so widely used that I have to migrate some applications from MySQL to PostgreSQL, many open source software is mysql as a database standard, and MySQL as the basis of the abstract, but the use of the process, found that MySQL has a lot of

T1 table 100 billion data, (insertion time 36 minutes, COUNT (*) query 19 seconds, space occupied about 670M)1. Truly full use of the indexsuch as like ' Zhang% ' is in line with Sarg (meet the scanning parameters) standardAnd like '% ' is not the

Parallel Using System; Using System. Collections. Generic; Using System. Diagnostics; Using System. Linq; Using System. Text; Using System. Threading;   Namespace ConsoleApplication2 { Class Test { Static void Main () { Int max = 500;

1. subquery optimization is not good. 2. Weak processing of complex queries 3. Immature query optimizer 4. Insufficient performance optimization tools and measurement information 5. Weak audit functions 6. Immature security functions, even rough.

1. subquery optimization is not good. 2. weak processing of complex queries 3. immature query optimizer 4. insufficient performance optimization tools and measurement information 5. weak audit functions 6. immature security functions, even rough.

ThinkPHP data paging Page. class. php. Download the ThinkPHP data Page. class. php The Page class ThinkPHP provides a data paging extension class library Page, which can be downloaded at http://www.thinkphp1.cn/extend/241.html. the official

The following is the PHP Chinese web summary of the use of PHP implementation of the article paging function, there are a variety of implementation methods, you can use and download the code snippets as needed, and a text version and video version

For ssh development, mysql is used for databases. ** _ When paging, you need to obtain the total data function totalCount, get totalPage, and get the code of totalCount (excluding the code such as binding parameters and checking input parameters): _

I saw a piece of Thinkphp code for Weibo development, but I didn't understand it in some places: I. Code in the Controller: {code...} homepage view * functionIndex () {code...} 2. Code in the View: {code...} "focuses on this: the user's profile

During the interview, you will be asked a variety of strange questions. You may be able to give the most perfect solution from the actual point of view when thinking about the solution. The following is a database-related interview question:

1. Download the CI framework (find it yourself)2. Configurationdatabase.php configuration:To set the connection parameter for the database server:SOURCE print? $db [ ' default '] [ ' hostname '] =  "Your-db-host";    $db [ '

T1 table 100 billion data, (insertion time 36 minutes, COUNT (*) query 19 seconds, space occupied about 670M)1. Truly full use of the indexsuch as like ' Zhang% ' is in line with Sarg (meet the scanning parameters) standardAnd like '% ' is not the

Image-oriented MySQL management tools abound, but there may not be more efficient than a MySQL client-driven command line for management tools that can really speed up and are not "graphs with tables." However, performing a generic query requires a

T1 table 100 billion data, (insertion time 36 minutes, COUNT (*) query 19 seconds, space occupied about 670M)1. Truly full use of the indexsuch as like ' Zhang% ' is in line with Sarg (meet the scanning parameters) standardAnd like '% ' is not the