sql server cheat sheet

Heap or B-tree. A lock that is used to protect a B-tree (index) or heap data page in a table that does not have a clustered index. Data Sheet TABLE TAB 5 Data table ID (objid field) The entire table that includes all the data and indexes. File FILE FIL 3 File number Database files. Application Application APP 10 6-

code, quantity, date) Product (product code, product name, Unit price) Please complete the following questions as required in Query Analyzer for SQL Server: 1, create a database named supermarket, the data file name is: supermarket_data.mdf, log file name is: Supermarket_log.ldf. 2, according to the requirements of table 1-6 to create 6 data tables, and set the primary key and foreign key code for each ta

, and the SQL statement looks like this:SELECT * from table name where field =49The injected parameter is id=49 and [query condition], that is, the build statement:SELECT * from table name where field =49 and [query criteria] (B) class= series The parameters of such injections are character types, and the original SQL statements are roughly as follows:SELECT * from table name where field = ' Soap series 'Th

partition table in SQL Server 2005 (iii): Converting a normal table to a component area tableCategory: SQL Server2009-12-03 17:01 9709 People read Comments (6) favorite reports SQL Serverinserttablenullsql DatabaseIn the design of the database, often do not take into account the problem of table partitioning, often

record pointer is above the first end of the data table, True indicates Yes, False noRs.eof returns whether the record pointer is outside the end of the data table, True indicates Yes, False noRs.delete deletes the current record, but the record pointer does not move downRs.addnew adding records to the end of the data tablers.update Updating Data Sheet Records Sort DESC is used to query the results when the results are sorted, descending sort, and A

Quickly inserting Excel data from OLE DB into SQL Server, where many people stitch sql through loops, this is not only error-prone but inefficient, the best way is to use bcp, or System.Data.SqlClient.SqlBulkCopy class to implement. Not only is it fast, but the code is simple, the following test code imports a sheet of

This article provides an indirectExcelData Import inOracleMethod: UseSQL ServerClose relationships with Excel. in SQL Server, use the OpenDataSource method to read Excel and spell the data into an oracle-compliant SQL statement. Run the following code in SQL server: SEL

SQL server database creation, table creation, and creation Constraints The following describes SQL server database creation, table creation, and constraints. -- Before creating the School database: first, determine whether the database exists. If so, delete the database and create it. If not, create the database ---- E

C #. Import the data in the Excel table to the corresponding table in the SQL Server database in ASP. NET. Here we will E: \ test.xlsMedium Sheet1The data in the table is imported to the test database. My_testTable. Software: vs2005, SQL Server2000, In test.xls, table sheet1 contains three fields: ID, name, and remarks. For details, see. 1,First, create a new m

Tags: style blog http ar color OS using SP forThis article is a series of articles in the fourth and the last, this article requires the first three articles of knowledge as the basis, the first three articles address as follows:On transaction log in SQL Server (i)----the physical and logical architecture of transaction logsTalking about transaction log in SQL

There are many ways to import Excel table data into a SQL Server database, and here are just a few of them:1, first, we have to create a new my_test table in the test database, the table has three fields Tid int type, tname nvarchar type, TT nvarchar type(Note: The data type in the My_test table must match the type of the corresponding field in Excel)2. We use SELECT * from OPENROWSET (' microsoft.jet.oledb

SQL Server, which quickly inserts the Excel data read by OLE DB, is used by many people to stitch through the loops to make it both error-prone and inefficient, and the best way to do this is to use BCP, which is System.Data.SqlClient.SqlBulkCopy class to implement. Not only is it fast and the code is simple, the following test code imports a sheet of more than 6

data page in a table that does not have a clustered index. Data Sheet TABLE TAB 5 Data table ID (objid field) The entire table that includes all the data and indexes. File FILE FIL 3 File number Database files. Application Application APP 10 6-byte hash value Application-specific resources. METADATA

drop table #tempSelect Name,identity (int,1,1) as IDInto #tempFrom syscolumnsWHERE id = (Select ID from sysobjectswhere xtype= ' u ' and name = ' sheet ')and name not in (' F1 ')DECLARE @i int, @totalcount intSet @i= (select Max (ID) from #temp)SELECT * FROM #tempDECLARE @sql varchar (4000)DECLARE @s_tablename varchar (20)DECLARE @s_columnsnname varchar (20)CREATE TABLE test_20170822 (F1 varchar ($), F2 flo

Introduction to Database Snapshots A database snapshot, as its name shows, is a view of the database at a point in time. Is the feature introduced by SQL Server version after 2005. There are more scenarios for snapshots, but the first goal of snapshot design is to report services. For example, I need a 2011 balance sheet, which requires the data to remain in the

Tags: LAN card service SDN view name parameter CSDN hrefOriginal: SQL Server prevents schema changes from being manually fixed in replication to synchronize fields that are added separately in the publication and subscriptionAs a result of previous needs, the replication schema change was forbidden, and a field was added to the publication and not synced to the subscription, and now a field with the same na

Label:First, create a data table1. Connect to the server;2. Right-click the Tables node and select New table, which is:3. In the Table Designer that pops up, enter the column name of the table, the data type selected, and whether to allow Nulls, that is:Second, Import data table1. Right click on the table name, pop-up menu, select "Import Data" in "task", that is:2. In the SQL

= ' zhaoliu1 ', userpassword= ' zhaoliu1 ', useremail= ' [email protected] ' WHERE id=5 Data query Grammar: Select column_name1,column_name2 ... from table_name [WHERE Condition][group by property name [having conditional expression]] [ORDER BY property [ASC | desc]] [l Imit SQL query statements can use one or more tables to query, and the where statement to set the query condition, the result of the query is a collection. Use an asterisk (*) to repl

server| Repeat | Recurring nightmare for Developers--delete duplicate records Presumably every developer has had a similar experience, and when querying or counting the database, the query and statistic results are inaccurate due to duplicate records in the table. The solution to this problem is to delete the duplicate records and keep only one of them. In SQL Server