sql server auto increment

Char Fixed-length non-Unicode character data, high efficiency Varchar Variable-length non-Unicode data for space saving Nchar Fixed-length Unicode data Nvarchar Variable-length Unicode data Text Storing long text information Ntext Store long text with variable length Date and time Date and time entered in single quotation marks Datetime Date and time

Recently, this problem occurs in the development project. After a record is inserted, it immediately obtains its auto-increment ID in the database to process the associated data. How can this problem be solved? You can do this in SQL Server 2000 in several ways. For more information, see the following description and c

_modules. Check whether the object names are consistent. Here we mention that sp_helptext has some restrictions. For more information, see restrictions and extensions of print and sp_helptext in SQL. Articles you may be interested in: SQL Server 2008 Manual modification of the table structure, the table cannot be saved and the Solution

Label: One, SQL Server table data is copied to Excel 1, new query, with SQL statements to read out the table data 2. Then, select data, right-click. Copy (also can click to copy with title), copy to Notepad (otherwise garbled) 3, then copy the contents of the Notepad, paste in Excel can be. Second, Excel copy to SQL

. However, SQL Server attempts to control the number of virtual log units, limiting it to a reasonable range, but there is a special case where log files are incremented every time and at least one virtual log unit is added. So, if a log file undergoes multiple small auto-growth, the number of virtual log units inside will be much larger than the normal log file.

the command prompt without a password, BCP uses the default password (NULL). -T Specifies that BCP uses the security credentials of a network user to connect to SQL Server through a trusted connection. No need for login_id and password. -V Reports the version number and copyright of the bcp utility. -R Specifies that currency, date, and time data is bulk copied into

SQL Server DBCC command Overview DBCC dropcleanbuffers: deletes all caches from the buffer pool and clears the buffer pool. During the test, you can use this command to clear all test data from the sqlserver data cache (buffer) to ensure the fairness of the test. Note that this command only removes the clean cache and does not remove the dirty cache. For this reason, before executing this command, you

SQL Server queries 31 to 40 records in the table, and writes an SQL statement to output 31 to 40 records in the UserInfo table in case of discontinuous IDS (the database is SQL Server, and the Automatically increasing id is used as the primary key, note that the ID may not b

automatic parameterized SQL statements introduced by SQL Server. Let's look at a concrete example. The following query creates a table that executes a simple SQL statement that is automatically parameterized by SQL Server. 1 --Cr

Sqlserver2000 synchronous ReplicationI. Preparations1. On the Publishing Server, the subscription server creates a Windows user with the same name, and sets the same password as the valid user who accesses the snapshot folder.-- Management Tools-- Computer Management-- Users and groups-- Right-click the user-- Create a user-- Create a Windows login user (synuser) affiliated to the Administrator Group)2. Cre

personally think that if most of the requests reach the second paradigm, the system will generate fewer columns and more tables, this reduces data redundancy and improves performance. 2, Reasonable redundancy It is almost impossible to design a system completely according to the standardization. Unless the system is very small, it is necessary to add redundancy in a planned manner after the standardization design. Redundancy can be a redundant database, a redundant table, or a redundant field.

statistics in the following situations:1. When the index is created, SQL Server automatically creates statistics on the index columns.2. Statistics are automatically created when SQL Server wants to use statistics on some columns and finds No.3, of course, we can also create manually.For example, an example of

, then write a 70mb thing, he will write to the ABC three files one time 40, 20, 10 of the data, if a log file is full, Will not be written to it Log files: Log files are written in sequence, and one is full before writing to another From the above, if you can increase its data file ndf, to facilitate the query speed of large data, but to increase the log file is not useful. 1.2: Set file autogrow (Big Data volume, small amount of data without setting) In SQ