The task is to build a tree in a table with parentID from bottom to top. It's useful for generating hierarchy strings, lists or any other types. You can also create a storage procedure of this and it will make it easy to use in queries.
(read more...)After installation of MS SQL Server 2012 on Windows Server 2012, I had gotten these errors in Event Viewer on execution server:
The server was unable to initialize encryption because of a problem with a security library. The security library may be missing. Verify that security.dll exists on the system.
TDSSNIClient initialization failed with error 0x139f, status code 0x80. Reason: Unable to initialize SSL support. The group or resource is not in the correct state to perform the requested operation.
TDSSNIClient initialization failed with error 0x139f, status code 0x1. Reason: Initialization failed with an infrastructure error. Check for previous errors. The group or resource is not in the correct state to perform the requested operation.
Could not start the network library because of an internal error in the network library. To determine the cause, review the errors immediately preceding this one in the error log.
SQL Server could not spawn FRunCommunicationsManager thread. Check the SQL Server error log and the Windows event logs for information about possible related problems.
I must notice that I had an old distributive of MS SQL Server 2012.
(read more...)There's a column Photo with type "Image" in MS SQL table (database – MS SQL Server 2008 R2). The task is to get all the records where Photo is empty. Values of empty images is "0x00000000".
To receive quantity of rows of the returned records of SQL query, you should use function @@ROWCOUNT. Function @@ROWCOUNT returns the quantity of rows, which were used in a query.
How to get as SQL query result the list of databases in SQL server.
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select name, database_id from sys.databases |
When you modify columns of a table in MS SQL management studio, you got the message "Saving changes is not permitted. The changes you have made require the following table to be dropped and re-created … " (Figure 1). The reason of this is re-creating of table. It's really important for productive environment but not very for test ones.
Rename table in MS SQL Server:
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sp_rename 'old table name', 'new table name' |
In this post I will write about SQL conditions. It seems to me that construction "IF ... ELSE" you can find in any language. Transact SQL is not exclusion.
Let’s see IF ... ELSE in action on the sample below. (read more...)
There are two functions for converting SQL data types from one to another. They are CAST and CONVERT. The second function is the best solution for converting datetime to format you need. (read more...)
Field with autoincrement is very useful thing and it's often used in MySQL. In MSSQL you can also need to use this tool. There are two ways to do it. (read more...)
