what is fact and dimension table in data warehousing

Here's what the code does today: 1. Read data from a database 2. Determine the value and process the following business logic based on the result of the decision Step1: Field read from database: Table $table_name, ID field data type is int Select Id from $

What is the use of SQL Server to compress data files? Prelude: The other day, due to customer problems (in fact, piracy issues), you can only use the free sqlserver Express version. The data file size of the entire database of the Express version of sqlserver

What is the Typecho blog's typecho_fields data sheet for? I'm studying Typecho blog, To find out where the background can write data, I can't even write this typecho_fields table. Reply content: What

PHP about fetching the data in the table is worth the problem Include ' connect.php '; $sql = "SELECT * from ' RWGL '. ' RWB '"; mysql_select_db ($mysql _database, $conn); $query =mysql_query ($sql, $conn) or Die ("error"); while ($row =mysql_fetch_array ($query)) { $i + +; ?> } ?> Mysql_close ($conn); ?> The result

Why is the data always inserted? This post was last edited by YXQC on 2014-05-05 14:20:32 From one database to another, there are 8 million data in the table. while ($mssql _row = Mssql_fetch_array ($rs)) $MID = $mssql _row[0]; $sql = "INSERT into Flow01 (TDM,) VALUES (' $TDM ',)"; mysql_query ($sql); And t

Php+mysql what is the fastest way to update millions data? Reply content: Php+mysql what is the fastest way to update millions data? InnoDB Read Detach Chaizi section to make redundant

A large number of IP addresses are required when addressing mobile data services. The current public IPv4 address has become a scarce resource, so mobile data operators are faced with the problem of choosing the address between IPV6 and private IPv4 addresses. At present, the industry generally believe that the 3G should be used IPV6 address. In addition, the choice of IPV6

memoryComparison between string and stringbuffer efficiencyIn some special cases, the string object will not change at a slower rate than the StringBuffer object, especially in the following string object generation, where string efficiency is far faster than StringBuffer:String"hello ""world"new"hello ""world" );You'll be surprised to find that the speed at which the string object was generated was simply too fast, and at this time StringBuffer had

Data type confusion: what is an int (11 )?, Confusionint Http://everythingmysql.ning.com/profiles/blogs/data-type-confusion-what-is-an Over and over I see MERs that don't understand whatint(11)Really means. Their confusion

first of all, what is an escape character? The escape character, in fact, is the specified PHP syntax with "\" to output. However, the syntax of the rules in different systems to transfer the role of the character is different, for example: in the Windows System carriage

Php always fails to query data. what is wrong with function ax ($ que) { If (! $ Connect) { $ Connect = mysql_connect ('localhost', 'axmanage', 'axmanpw '); Mysql_select_db ('dex ', $ connect); // The connection is successful, but the query always fails. $ Query = mysql_query ($ que); // This sentence fails. If