types of cursor in sql server

Number Standard parcel Code (LANDCODE) Section Code (SECTCODE) 1 131001bg001 G001 2 131001bg002 G001 3 131001bg003 G001 4 131001bg004 G002 5 131001bg005 G003 Now you need to convert the data in the table to the results shown in the following table: Number Section coding Included Standard parcel 1 G001 131001bg001,131001bg002,131001bg003

SQL Server cursor statement usage:Copy codeThe Code is as follows:-- Declare a cursorDECLARE MyCursor CURSORFor select top 5 FBookName, FBookCoding FROM TBookInfo // defines a cursor called MyCursor, which stores data after select-- Open a cursorOPEN MyCursor // OPEN This dataset-- Loop a cursorDECLARE @ BookName nvarc

I. BACKGROUND In the performance tuning or need to understand a database table information, the most intuitive way is to list the data of all the table information, including: The number of records of the table, data capture space, index footprint, unused space, etc. (as shown in Figure1), With this information you can simply determine that the pressure on the database from the data may be caused by a certain table. Because the larger the table data, the greater the impact on database performan

purchase, that is, to obtain a view, as shown below: Serial number Name Item Summary 1 Zhang San Print paper, computer 2 Li Si Clothes, mobile phones Because you want to get a view, you cannot display it in the storage process. You only need to use functions. Of course, you can also query the purchased items one by one on the client based on the query results, however, multiple round-trips to the C/S end will affect the speed of creating a vie

---- SQL Server cursor usageBeginDeclare @ item_code varchar (32) -- define variablesDeclare @ item_name varchar (32)Declare @ invest_money_sum float-- Define a cursorDeclare my_cursor cursorForSelect item_code, item_name, invest_money_sum from zftz_project_sheji_result-- Open the cursorOpen my_cursorFetch next from my_cursor into @ item_code, @ item_name, @ inve

correctFETCH NEXT from Order_cursor into @temp--go to the next cursor, no dead loopEndClose Order_cursor--closing cursorsDeallocate order_cursor--Release cursorEndGo--View Results--SELECT * FROM Student2) query results after execution4. Cursor loop (transaction)1) According to the actual circulation of student table information---cursor loop traversal--Begindecl

loopEndClose Order_cursor--closing cursorsDeallocate order_cursor--Release cursorEndGo--View Results--SELECT * FROM Student2) query results after execution4. Cursor loop (transaction)1) According to the actual circulation of student table information---cursor loop traversal--Begindeclare @a int, @error intDECLARE @temp varchar (50)Set @a=1Set @error =0BEGIN TRAN--declaration of affairs--declares that the

The following article mainly describes the SQL Server cursor instance, if you encounter a SQL Server cursor instance in the actual operation, but you do not know how to apply correctly to it, then the following article to you must

SQL server creates two types of temporary tables: Writing and deleting temporary tables. SQL server -- Create and delete temporary tables -- Method 1: create table # tmp (name varchar (255), id int) -- Method 2: select count (id) as storyNum, sum (convert (numeric ), case wh

ready e_id, e_name, e_salary; exit when cur % NOTFOUND; dbms_output.put_line ('No.:' | e_id | 'name: '| e_name | 'salary:' | e_salary ); end loop close cur; END; Dynamic Cursor dynamic SQL is one thing SQL Server supports four types of cursors: static cursors, dynamic cu

Label:Often write stored procedures, but today in the use of cursors or negligence of some things, the implementation of the process has not been carried out, and then directly linked to SQL Server, the lesson Ah! Although the code is simple, I hope to remember: Create PROCEDURE [dbo]. [TEMPHXB] As BEGIN declare @uidintDeclare mycursortemp Cursor for SelectUid fr

Correspondence between data types in SQL Server and data types in MySQL (EXT): 78899477One, SQL Server and MySQL data storage differences1, datetime in SQL

Tags: SQL Server cursorUse DatabaseNameDeclare @tblname char (100)Declare @sql char (5000)Declare table_cursor cursor for select name from sysobjects where name like ' tb_card[_]% ' and nameand nameOpen Table_cursorFETCH NEXT from Table_cursor to @tblnameWhile @ @FETCH_STATUS = 0BEGINSet @

Original: Common cursor looping usages in SQL Server stored proceduresWith cursors, and while you can traverse every record in your query and pass the required fields to variables for appropriate processingDECLARE @A1 VARCHAR(Ten),@A2 VARCHAR(Ten),@A3 INTDECLAREYoucurnameCURSOR for SELECTA1,a2,a3 fromYoutablenameOPENYoucurnameFetch Next fromYoucurname into @a1,

+ BEGIN - PRINT 'the values for the current @id are:'+CONVERT(NVARCHAR( -),@ID) + END A PRINT 'assigns a value of 0 to @id' at --assigns a non-null value to the @id and outputs - SET @ID = 0 - PRINT 'the values for the current @id are:'+CONVERT(NVARCHAR( -),@ID) - GO Sample Code The first output @ID start the first output @ID finished the second output @ID start current @ The value of the ID is: the second output @ID complete (1 rows affected) current @ The

SQL Server supported data types for getting started with SQL ServerCommon data types1. Integral type data1) bit, can only store 0, 1, and null values null.2) tinyint, a positive number without a sign bit, takes 1 bytes, 8 bits, and supports a data range of 0~2^8-1.3) smallint, with sign bit, occupies 2 bytes, 16 bits,

extended characters. This data type can store 4000 characters, increasing the byte space used by nvarchar Unified coded Character type The nvarchar data type is used as a uniformly encoded character type data that is variable length. This data type can store 4000 characters, using a byte space increase of one ntext Unified coded Character type The ntext data type is used to store a large number of uniformly encoded character-type data. This data

this: 1 SELECT * from Hr.employees 2 where LastName like '%a% ' The results shown are: Where% represents a wildcard character, you can think of any characters. SQL data Type SQL contains a variety of data types to meet a variety of development needs. Common types of data include: (1) Binary data type. Binary data i

representation of a single record in a table, unless a WHERE clause is used to restrict only one record from being selected. So we have to use cursors to handle single-record-oriented data processing. Thus, cursors allow the application to perform the same or different operations on each row of the rows result set returned by the query statement Select, rather than one operation for the entire result set at a time, and it also provides the ability to delete or update the data in the table based

server| Data | Data type 1.SQL Server data types Data class is a property of data that represents the type of information that the data represents. Any computer language defines its own data type. Of course, different programming languages have different characteristics, the types