fact tables and dimension tables in data warehousing

Are you struggling to optimize your SQL Server database? If your database contains many very large tables, the partition function can help you a lot ...... [IT expert network exclusive] Are you also struggling to optimize your SQL Server database? If your database contains many very large tables, the partition function can help you a lot, because it can split these large

MySQL study Notes-insert row records into data tables 1. use the INSERT statement to INSERT new data Syntax: INSERT [INTO] tbl_name [(col_name,...)] VALUES (pression ,...),... INSERT [INTO] tbl_name SET col_name = expression ,... Let's start to use the INSERT statement to add records. this is an SQL statement. you need to specify the table for which you want to

First, stop the Database Service and the SQL Server service. // Retrieve all the table names in a database (table) String strconn = "provider = Microsoft. Jet. oledb.4.0;" + "Data Source =" + strpathname + ";" + "extended properties = Excel 8.0 ;"; String strfieldname = "";Oledbconnection objconn = new oledbconnection (strconn );Try{Objconn. open ();}Catch (exception ex){M_strlasterror = ex. message;Return "";}String strtablename = "";If (strworkfo

1. Two Ways to delete table data A. Delete * From my_table; B. truncate table my_table; 2. Delete the entire tableDrop table my_table; How can we recover tables accidentally dropped? In fact, Oracle also has a similar "recycle bin" For example, you accidentally deleted the my_table table.Drop table my_table;When you use the SELECT statement to query this

Basic operations on MySQL Data Tables and basic operations on mysql DATA The following outlines are provided in advance, and details and examples are provided tomorrow: 1. Create a data table 1) Create Table syntax 2) use primary key constraints 3) use foreign key constraints 4) use non-empty Constraints 5) Use uniqu

Oracle Creates table partitions based on existing tables and data and imports data. Assume that the existing System. Test Table has over 10 million data records and is in the ts_Test tablespace. The table contains column A, which partitions data with column A = 6 and column

In addition to the technique of "reading Excel data to form HTML tables," You might be interested in learning how to implement a list of spreadsheet and name-range Drop-down menus using a program. In addition to the contents of the cell, you can know more information with ADO--on top, we've discussed using it to get a list of field names. Call the OpenSchema method to get a special set of records that cur

How does php call $ query nbsp ;= nbsp; $ db- gt; query ("SELECT nbsp; list_dir, list_id, list_name, list_status nbsp; FROM nbsp; ff_list nbsp; WHERE nbsp; list_statu php: how to call data in two associated data tables $query=$db->query("SELECTlist_dir,list_id,list_name,list_statusFROMff_listWHERElist_status!=0ORDERBYlist_idASCLIMIT0,30");while($n=$db->fet

Emptying records from all data tables in SQL ServerClear all records in the data table:The code is as follows: exec sp_msforeachtable @Command1 = ' truncate table? 'Delete all data tables:The code is as follows: Exec sp_msforeachtable ' delete N '? 'Method of emptying all table dat