convert access query to sql server

dataset getdataset (string query){Oracleconnection con = new oracleconnection (configurationsettings. etettings ["oracle"]);Oracledataadapter da = new oracledataadapter (query, con );Dataset DS = new dataset ();Da. Fill (DS );Return Ds;} # Endregion}} Save, close this file, and create another class file sqlhelper. CS to access the

I/O.2. vertically and horizontally split the table to reduce the table size (sp_spaceuse)3. upgrade hardware4. Create an index based on the query conditions, optimize the index, optimize the access mode, and limit the data volume of the result set. Note that the fill factor should be appropriate (preferably the default value 0 ). The index should be as small as possible. Use a column with a small number of

Both cast and convert in SQL Server convert an expression from one data type to another data type. Because SQL Server provides two features, it can be confusing to choose which feature should be chosen or in which case the feature

path must be a valid path on the server. For example, this example creates a linked server named Anna that operates on an Access database named Dos.mdb under My Documents \ Folders, and executes in SQL Query Analyzer: e:\ sp_addlinkedserver ' Anna ', '

In SQL Server, both the cast and CONVERT functions are available for type conversions, and their functions are the same.It's just a different syntax.Cast is generally easier to use, and the advantage of convert is that dates and values can be formatted.Select CAST (' 123 ' as int)--123Select

;--current session process ID SELECT @ @textSize; SELECT @ @version;--Current database version information 9. System Statistic function SELECT @ @CONNECTIONS;--Number of connections SELECT @ @PACK_RECEIVED; SELECT @ @CPU_BUSY; SELECT @ @PACK_SENT; SELECT @ @TIMETICKS; SELECT @ @IDLE; SELECT @ @TOTAL_ERRORS; SELECT @ @IO_BUSY; SELECT @ @TOTAL_READ;--Read disk count SELECT @ @PACKET_ERRORS;--Number of network packet errors that occurred SELECT @ @TOTAL_WRITE;--sqlserver the number of disk writes p

horizontally split the table to reduce the table size (sp_spaceuse)3. upgrade hardware4. Create an index based on the query conditions, optimize the index, optimize the access mode, and limit the data volume of the result set. Note that the fill factor should be appropriate (preferably the default value 0 ). The index should be as small as possible. Use a column with a small number of bytes to create an in

Label:In SQL Server, both the cast and CONVERT functions are available for type conversions, and their functions are the same. It's just a different syntax. Cast is generally easier to use, and the advantage of convert is that dates and values can be formatted. Select CAST('123' as int)--123 Select

CONVERT (CHAR (Ten), Current_timestamp, 105) 106 2006 CONVERT (CHAR (one), Current_timestamp, 106) 107 Feb 22, 2006 CONVERT (CHAR (), Current_timestamp, 107) 108 16:26:08 CONVERT (CHAR (8), Current_timestamp, 108) 109 Feb 2

create_time1 297211672 8586 16:05:522 297211672 8588 16:17:183 297211671 8588 16:25:144 297211671 9983 18:21:55(4 rows affected) Statement and query result: The code is as follows:Copy code Select convert (varchar (100), GETDATE (), 0): 05 16 2006 AMSelect convert (varchar (100), GETDATE (), 1): 05/16/06Select convert