This article collects 10 articles about the mysql_affected_rows() function and recommends it to everyone 1. PHP interview question 5 - MySQL database (basic part) mysql database download 64-bit sql database instance download sql database patch download introduction : Mysql database: PHP interview question No. 5 - MySQL database (basic part): mysql_num_rows() mysql_affected_rows() Both functions act on the results of the mysql_query($query) operation, and mysql_num_rows() returns the number of rows in the result set. mysql_affected_rows() gets the number of record rows affected by the previous MySQL operation. mysql_num_rows() is only valid for SELECT statements, to get the number of changed rows after INSERT, UPDATE or DE2. PHP updates mysql to get the number of changed rows_PHP tutorial introduction: PHP updates mysql to get the number of changed rows. A php update
1. A summary of articles about the mysql_num_rows() function
##Introduction: This article collects 10 articles about the mysql_affected_rows() function, recommended to everyone 1. PHP interview question 5 - MySQL database (basic part) mysql database download 64-bit sql database instance download sql Introduction to database patch download: Mysql database: PHP interview question No. 5 - MySQL database (basic part): mysql_num_rows() mysql_affected_rows() Both functions act on mysql_qu...
2. Mysql_affected_rows function definition and usage summary
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Articles about the mysql_affected_rows() function Recommended 10 articles
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Detailed introduction to the mysqli_affected_rows() function
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Analysis of the row count return value of the PHP function mysqli_affected_rows
## Introduction: This article mainly introduces the row number return value of mysqli_affected_rows function in PHP. It analyzes the usage of normal mode and oop mode with examples. It has certain reference value. Friends in need can refer to it
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MySQL-mysql error 1449 solutionIntroduction: Permissions Problem, grant all sql privileges to rootmysql> grant all privileges on *.* to root@% identified by .;Query OK, 0 rows affected (0.00 sec)mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)
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3 ways to clear binlog in MySQL!Introduction: 1 mysql command purge mysql> purge master logs to "mysql-bin.000410"; Query OK, 0 rows affected (3.71 sec ) 8. How to deal with 0 affected rows after the mysql-MySQL stored procedure submits the transaction? Introduction: My stored procedure is written as follows START TRANSACTION; # Execute the insert data operation COMMIT; The result is 0 row(s) affected. The actual data has been inserted. I expect it to be able to Get the actual number of affected rows 9. mysql_affected_rows and mysql_num_rows Introduction:: This article mainly introduces mysql_affected_rows and mysql_num_rows, students who are interested in PHP tutorials can refer to them. Introduction: Mysql database: PHP interview question No. 5 - MySQL database (basic part): mysql_num_rows() mysql_affected_rows() Both functions act on the result of the mysql_query($query) operation, mysql_num_rows () Returns the number of rows in the result set. mysql_affected_rows() gets the number of record rows affected by the previous MySQL operation. mysql_num_rows() is only valid for SELECT statements. To obtain the INSERT, UPDATE or DE After UPDATE, use mysql_affected_rows to determine whether it is successful. If not, INSERT will result. Something goes wrong. mysql - The exec method of database pdo in php returns the problem of affecting the number of rows php - The sql statement is successful, but the number of rows changed is 0? ? ? About the error reporting problem of mysql grant permission statement
The above is the detailed content of 10 recommended content for affected. For more information, please follow other related articles on the PHP Chinese website!

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.

ToaddauserremotelytoMySQL,followthesesteps:1)ConnecttoMySQLasroot,2)Createanewuserwithremoteaccess,3)Grantnecessaryprivileges,and4)Flushprivileges.BecautiousofsecurityrisksbylimitingprivilegesandaccesstospecificIPs,ensuringstrongpasswords,andmonitori

TostorestringsefficientlyinMySQL,choosetherightdatatypebasedonyourneeds:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseTEXTforlong-formtextcontent.4)UseBLOBforbinarydatalikeimages.Considerstorageov

When selecting MySQL's BLOB and TEXT data types, BLOB is suitable for storing binary data, and TEXT is suitable for storing text data. 1) BLOB is suitable for binary data such as pictures and audio, 2) TEXT is suitable for text data such as articles and comments. When choosing, data properties and performance optimization must be considered.

No,youshouldnotusetherootuserinMySQLforyourproduct.Instead,createspecificuserswithlimitedprivilegestoenhancesecurityandperformance:1)Createanewuserwithastrongpassword,2)Grantonlynecessarypermissionstothisuser,3)Regularlyreviewandupdateuserpermissions

MySQLstringdatatypesshouldbechosenbasedondatacharacteristicsandusecases:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseBINARYorVARBINARYforbinarydatalikecryptographickeys.4)UseBLOBorTEXTforlargeuns


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