how to check blank value in sql server

This is the first time I used SQL Server ce to practice entitier framework. this error is reported for a simple insert operation. I checked msdn later and found it because I used the auto-increment field, in the Entity Framework, SQL Server ce does not support keys or values generated by the

process. the SQL Server 2008 R2 upgrade Setup Wizard wocould not allowUs to proceed and disabled the "upgrade rules" page as shown below. For the detailed error message, I clicked on "failed" hyperlink in the Status column to read more about the error, but this was not enough to help me understand the issue. here is the screen shot: So I decided to check the upg

SQL SERVER uses REPLACE to REPLACE a value in a field in a column with another value. sqlreplace SQL SERVER replaces a value in a field with another value.Update table name set column n

table tb_supplier; --Rebuild table and CHECK constraint CREATE table Tb_supplier (supplier_id number , supplier_name VARCHAR2 (M), contact_name varchar2,/ * Define a CHECK constraint, which takes effect after it has been enabled * * CONSTRAINT check_tb_ supplier_id CHECK (supplier_id BETWEEN and 9999) DISABLE ); --Enable constraint ALTER TABLE tb_su

Edition on Windows NT 5.0 (build 2195: Service Pack 3)8.00.760 indicates the SQL Server version and patch number. The relationship is as follows: 8.00.194 ------- SQL Server 2000 RTM8.00.384 ------- (SP1)8.00.534 ------- (SP2)8.00.760 ------- (SP3)8.00.2039 ------- (SP4) In this way, we can see the correct version and

An error occurred while establishing a connection with the server.Common solutions:1. Check the default logon method of SQL server. The default logon mode is windows integrated logon. to log on with an account, you must change it to SQL hybrid logon mode.2. Check the Configu

server| View The following two views are based on system table sysobjects, syscomments, and system view sysconstraints, including the table ID, table name, column ID, column name, check constraint ID, check constraint name, The check constraint status value and the contents

I have been searching for this stuff on the Internet for a long time, either incomplete or not what I wanted. I finally figured it out and posted it. Please help me to see if there are still defects. // Global variableString szsqlservicename; // database server nameString szsqlservicename1; // database server name (cache)String szsqlservicefilepath; // path of the execution file of the Database ServerString

Several common creation methods are listed a few days ago. SQL Server Login , Login , User , System stored procedures used by roles and Groups , Of course, you also need to check Connectiongstring String SQL Server Login and database users . The following two

int update (String sql){Close ();Open ();SqlCommand sc = new SqlCommand ();Sc.commandtext = SQL;Sc.commandtype = CommandType.Text;Sc. Connection = conn;int x = SC. ExecuteNonQuery ();Close ();return x;}Traversing data in a tablePublic SqlDataReader Sdread (String sql){Close ();SqlDataReader SDR;Open ();SqlCommand cmd = new SqlCommand ();Cmd. Connection = conn;Cm

There are two methods: Step 1: query using SQL statements Select @ version The query result is as follows: Microsoft SQL Server 2000-8.00.2039 (Intel x86)May 3 2005 23:18:38Copyright (c) 1988-2003 Microsoft CorporationPersonal Edition on Windows NT 5.1 (build 2600: Service Pack 2) In fact, in c: \ Program Files \ Microsoft

Step 1: query using SQL statementsSelect @ versionThe query result is as follows:Microsoft SQL Server 2000-8.00.2039 (Intel x86)May 3 2005 23:18:38Copyright (c) 1988-2003 Microsoft CorporationPersonal Edition on Windows NT 5.1 (build 2600: Service Pack 2)8.00.2039 indicates the version of the installed SQL

Label:Error occurred while generating SQL file with power Designer [ERR] 1064-you has an error in your SQL syntax; Check the manual that corresponds t o your MySQL server version for the right syntax to use near ' int not null auto_increment comment ' user ID ', The solution The S