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(Date ("y-m-d", $row [$i -2][5])); $objPHPExcel->getactivesheet ()->setcellvalue (' F '. $i, ConvertUTF8 ($row [$i -2][6]); $objPHPExcel->getactivesheet ()->setcellvalue (' G '. $i, ConvertUTF8 ($row [$i -2][7]); $objPHPExcel->getactivesheet ()->setcellvalue (' H '. $i, ConvertUTF8 ($row [$i -2][8]); } After the default sheet, create a worksheet echo Date (' H:i:s '). "Create new Worksheet object\n"; $objPHPExcel->createsheet (); $objWriter = Phpexcel_iofactory::createwriter ($objExcel, ' Exc

Detailed description of unique constraints and NULL in MySQL, and detailed description of null constraints in mysql Preface In the previous requirement, the simplified description is to accept MQ messages from other groups and insert a record in the database. To prevent them from sending messages repeatedly and insert multiple duplicate records, a unique index is

Detailed description of Mysql master-slave synchronization configuration practices, detailed description of mysql master-slave practices 1. Introduction I have written an article about the principle of Mysql master-slave synchronization. I believe that all the shoes I have read in this article are in full swing. Have you tried it? Today, we have a master-slave mysql synchronization practice! 2. Environment

Springboot java configuration method (instance description), springboot instance description 1. Create a User object class. @Datapublic class User { private String username; private String password; private Integer age;} 2. Create UserDao to simulate database interaction. Public class UserDao {public List 3. Write UserService to implement User data operation business logic. @ Servicepublic class UserServic

Detailed description of mysql redundancy and duplicate indexes, detailed description of mysql redundant Indexes Mysql allows you to create multiple indexes on the same column, whether intentionally or unintentionally. mysql needs to maintain duplicate indexes separately, and the optimizer also needs to consider the query optimization individually, this affects performance. Duplicate indexes refer to the sam

Detailed description and comparison of the four transaction isolation levels of MySQL, and detailed description of mysql Detailed description and comparison of the four transaction isolation levels of MySQL At the SQL: 1992 transaction isolation level, InnoDB is REPEATABLE READ by default ). MySQL/InnoDB provides all four transaction isolation levels described in

Php string type description, php string description PHP supports eight primitive types ). Four scalar types: Two composite types: Two special types: String type A string is a string of characters, like "Hello world! ". There are three methods to define a string: 1. Single quotes Enclose a string with single quotes (') is the easiest way to define a string: If the string contains single quotation marks, es

Php implode () function description, implode Function Description What is the function of php implode? In php, the implode () function returns a string composed of array elements. It is opposite to the php explode () function. The php explode () function is: use one string to separate another string and return an array consisting of strings. After learning about the functions of the php implode () function

Description of the types of new features in php 7, and description of new features in php Preface PHP 7 makes it possible to declare a type. PHP 7 supports the following types of parameter types: Integer Floating Point Type String type Boolean Type The demo of function form participating in the return type declaration is as follows: /*** @ Author yuan Chao We have defined a Demo class, which con

Tags: des style blog http io cti ar htmlHow to specify a description for a column when creating a table with an SQL statement. The sp_addextendedproperty is used primarily for this stored procedure.Grammar sp_addextendedproperty[@name =] {' property_name '}[, [@value =] {' V Alue '} [, [@level0type =] {' Level0_object_type '} , [@ Level0name =] {' Level0_object_name '} [, [@level1type =] {' Level1_object_type '} , [@lev

The Session Description Protocol (SDP) provides multimedia session descriptions for session notifications, session invitations, and other forms of multimedia session initialization. The session directory is used to assist with multimedia conference announcements and send relevant settings for session participants. SDP is used to transmit this information to the receiving end. SDP is completely a session descript