how to check blank value in sql server

As we all know, in C #, it is easy to use the split method to divide a string into an array with the specified characters, but in T-SQL, it is .... In my project, there are the following applications: Read a batch of data in batches, then process the data in each row. After processing, return the processed ID and the failed ID to the database, this involves a batch update problem. Do you want to write IDs one by one for batch processing and update the

Label:CREATE TABLE Test(Department varchar (10),Customer varchar (10),Cost name varchar (10),Amount int)INSERT into test values (' A ', ' a ', ' phone fee ', 10)INSERT into test values (' A ', ' a ', ' run at public expense ', 11)INSERT into test values (' A ', ' a ', ' Bus fee ', 9)INSERT into test values (' A ', ' B ', ' phone fee ', 10)INSERT into test values (' A ', ' B ', ' public expense ', 10)INSERT into test values (' A ', ' C ', ' Bus fee ', 10)INSERT into test values (' B ', ' d ', ' p

The following articles mainly describe that the guid value is used as the row identifier in the SQL server data table. The GUID (Global unique identifier) is a globally unique identifier) it is a 16-byte binary value generated by the ID number on the NIC (each Nic has a unique ID number) and the unique number of the CP

Yesterday, someone discussed in the group three functions that SQL server returned the last identity value: ident_current, @ identity, and scope_identity, and made some markup and summary. In fact, msdn has an official explanation for this: all three functions return the final generated id value. However, the "last"

An identity column in SqlServer2012 has an attribute:When the server restarts, the identity column defined as int automatically adds 1000 to the original maximum value. For example, your original self-increment column of the maximum value is 2, then you restart after inserting a piece of data into the table, your self-increment column will be 1002, in 2008 should

We know that SQL Server has a very strong selection of drivers for a linked server (linked server), a linked server (linked server) that was recently established with the Microsoft OLE DB driver for ODBC, and when the stored proce

For example: We import a customer's information, we know that the customer's name is Zhangshan, we want to know, in our business database (Eg:northwind), which of the data tables which fields set the name value Zhangshan, through the following SQL, This is what we can do, where the SQL search has been locally modified from the Web. One, the search data is a strin

In general, we like to use session to store our variables. ASP. NET provides the following methods to store session values:InprocState ServerSQL Server "Inproc" indicates that we store the session value in the same way as traditional ASP, and "State server" indicates that we use another host to store the session value.

For SQL Server 2000来, it provides two new functions (ident_current,scope_identity) and improves the @ @IDENTITY. When you insert a new record, you can call the function: PRINT ident_current (' table ') ' This will get the new identity value, regardless of whether there is a record added to the database (this avoids the @ @IDENTITY connection limit) Or: PRINT scop

the row data SET @sql_str = N ' SELECT @sql_col_out = ISNULL (@sql_col_out + "," "," ") + QUOTENAME ([' [email protected]+ ']) from [' [E-mail protected]+ '] ' [email protected]_where+ ' GROUP by [' [email protected]+ '] ' --print @sql_str EXEC sp_executesql @sql_str, N ' @sql_col_out NVARCHAR (MAX) output ', @[email protected]_col output --print @sql_col SET @sql_str = N ' SELECT * FROM ( SELECT [' [Email protected]+ '],[' [email protected]

Calculate the column and average value in the SQL Server database Strictly speaking, Having does not need a subtable, but Having without a subtable does not have practical significance. If you only need one table, you can use the Where clause for all purposes. For practice, Having assumes at least two tables and a aggregate function based on the second table. The

Scope_identity Returns the last identity value inserted into the identity column in the same scope. A scope is a module-stored procedure, trigger, function, or batch processing. Therefore, if the two statements are in the same stored procedure, function, or batch processing, they are in the same scope. Ident_current Returns the final id value generated for any session and specified table in any scope.

We often want to query the index, constraints, relevance, and trigger attributes of a table. We need to know the meaning of the fields in the table "sysobjects", so no matter what we need to query, there is no problem! Sysobjects: each database in the SQL-SERVER has this system table, which stores all the objects created in the database, such as constraints, default values, logs, rules, stored procedures, e

Tags: convert har arch database share picture data type serve error colorSee SQL, use DATEADD () to convert the Times title error, because the database table in the data format is incorrect, the data format is incorrect, the data format is incorrect, the important thing to say 3 times !Ca.batch_no the first 8 bits must be date format YYYYMMDD, otherwise it will error!When a title error occurs, first troubleshoot the

How to determine the maximum value in the SQL Server bar CREATE TABLE [dbo]. [Minmax] ( [Minmaxid] [INT] IDENTITY (1,1) not NULL, [Value1] [INT] Null [Value2] [INT] Null [Value3] [INT] Null [Value4] [INT] Null CONSTRAINT [Pk_minmax]primary KEY CLUSTERED ( [Minmaxid] Asc With (pad_index= off, ignore_dup_key = out) on [PRIMARY] ) on [PRIMARY] Note that

How to determine the maximum value in the SQL Server bar CREATE TABLE [dbo]. [Minmax] ( [Minmaxid] [INT] IDENTITY (1,1) not NULL, [Value1] [INT] Null [Value2] [INT] Null [Value3] [INT] Null [Value4] [INT] Null CONSTRAINT [Pk_minmax]primary KEY CLUSTERED ( [Minmaxid] Asc With (pad_index= off, ignore_dup_key = out) on [PRIMARY] ) on [PRIMARY] Note that

If we insert a value in the identity column, for example: Insert member (ID,USERNAME) VALUES (' admin ') The error message is returned in the Query Analyzer: Reference content Server: Message 544, Level 16, State 1, line 1 When IDENTITY_INSERT is set to OFF, you cannot insert an explicit value into an identity column in table ' member '. An error message is re

Recently, I have used the operation of SQL Server database to do something. Well, really long time did not see, to this database is unfamiliar to the pole, even the simplest how to set an ID primary key, let it with the insertion of data, automatic growth ID value settings are forgotten, online check a bit, many people

Recently there is a project that needs to check whether a character field value is a number, because the data row is massive, so need to pass through the SQL statement to screen, here to make a memo. The function used is isnumeric, and the concrete statement looks like this: Copy Code code as follows: SELECT * From table WHERE isnumeric (field name to

DateTime for SQL Server 2005, 2008The minimum value is: 1753-01-01 00:00:00Maximum value is: 9999-12-31 23:59:59.997This does not match Datetime.minvalue, DateTime.MaxValue in. NET, and System.Data.SqlTypes.SqlDateTime.MinValue, System.Data.SqlTypes.SqlDateTime.MaxValue matches.In fact, the. NET and