PHP

PHPExcel is a very powerful plug-in for excel operations. We can use the PHPExcel plug-in to read and write excel. Let's take a look at it. PHPExcel is a very powerful plug-in for excel operations. We can use the PHPExcel plug-in to read and write

Sometimes the database is damaged due to power loss or other reasons. We can use the mysql mysqlcheck command to quickly repair all databases or specific databases. For example, we can check, optimize, and fix all databases: 1. run CMD to start the

Clustered index, data is actually stored in order, and the data page is on the index page. It is as if all topics are arranged in order in the reference manual. Once the data to be searched is found, the search is completed. For non-clustered

To improve the efficiency of database operation, we need to hit the execution plan as much as possible to save the running time. To improve the efficiency of database operation, we need to hit the execution plan as much as possible to save the

What if you forget the root password of the online MySQL database one day? 1. Close the MySQL database. mysqladmin cannot use the root password because it is forgotten. In this case, killpid can only be used to close the program. What if you forget

Long-term Experience and shortcomings in using medium-sized Access databases Long-term Experience and shortcomings in using medium-sized Access databases When an Access database is in use, the following problems occur: 1. The Update statement may

Partitioning is committed to solving the key issues that support large tables and indexes. It uses a small and easy-to-manage partition-based piece (piece) method. Partitioning is committed to solving the key issues that support large tables and

OracleSecureFile Oracle SecureFile Function The SecureFile function is a completely re-designed implementation of the large object (LOB) storage format in oracle 11g. The original LOB storage format is now called BASIXFILE, and it is still the

Used for sampling statistics. Users are randomly selected from the database by category. Used for sampling statistics. Users are randomly selected from the database by category. Use the dbms_random package of oracle combined with rownum. For

The following is an example of php reading and generating a unicodecsv file. I hope this example will help you. the following is an example of how php reads and generates unicode csv files. I hope this example will help you. Script ec (2); script =

When we use php to download a file, you will find that the file to be downloaded is large, but the developer does not use Accept-Length to obtain the downloaded file size, next let's take a look at the example of how to get the size of the

Php itself is not ideal for multi-threaded processing, but if we use pthreads, the performance will be improved. Let's look at a PHP multi-threaded pthreads example. php itself is not ideal for multi-threaded processing, however, if we use pthreads,

What I see most on the Internet is the conversion of Chinese characters to unicode encoding. Today we can see that the opposite operation is to convert unicode to Chinese, next, let's take a look at the most common Chinese character conversion

There are spaces and ascill spaces in php, so we need to sort them together to replace them, let's take a look at an example of php replacement and filtering of all the blank characters and spaces. In php, there are spaces and ascill spaces. So we

The article page is usually a small process of article content too long to facilitate reading. Let's take a look at an example of using PHP to pagination long articles. The details are as follows. The article page is usually a small process of

If you need to reinstall Mysql in special circumstances, you should do the following: 1. if the previous database still needs to be used, you should back up the entire Mysql directory after stopping mysql. the command to stop mysql is as follows:

I plan to write some knowledge about database operations. Now I have finished the first article. The following is a record of basic knowledge about mysql operations. I plan to write some knowledge about database operations. Now I have finished the

The Oracle analysis functions RANK (), ROW_NUMBER (), and LAG () can be used. For more information, see. The Oracle analysis functions RANK (), ROW_NUMBER (), and LAG () can be used. For more information, see. ROW_NUMBER () OVER (partition by COL1

Recently, a friend asked me in the Group how to completely uninstall ORACLE10g. Here, I will simply sort it out to make it easier for anyone who needs it. Recently, a friend asked me in the Group how to completely uninstall ORACLE 10 Gb. Here, I

For transaction tables, use BEGIN and COMMIT instead of LOCKTABLES to speed up insertion. For transaction TABLES, use BEGIN and COMMIT instead of lock tables to speed up insertion. Locking also reduces the overall time for multi-connection testing,