SQL Server script Error: Insufficient result space to convert uniqueidentifier value to char.

Error:

Getting below error while trying to copy data from one table to another:

Msg 8170, Level 16, State 2, Line 1004

Insufficient result space to convert uniqueidentifier value to char.

Fix:

UserID column which would be having Unique identifier data require more space (36 character). Size is specified as 15 here.

To fix it just specify 36 as varchar length or specify Uniqueidentifier as data type for UserID column.

Comments

While executing Select query to pull data from a different server, SQL Server is showing following error:

Msg 7202, Level 11, State 2, Line 1 Could not find server 'LAPTOP-09O6NE3K\SQLEXPRESS03' in sys.servers. Verify that the correct server name was specified. If necessary, execute the stored procedure sp_addlinkedserver to add the server to sys.servers. Completion time: 2024-02-05T17:18:24.6869756+05:30 Solution: Step1: Check if the server is available in the sys.servers table SELECT name from sys.servers Step2: If no, add the new server to the sys.servers table EXEC sp_addlinkedserver @server = 'server name' Eg" EXEC sp_addlinkedserver @server = 'LAPTOP-09O6NE3K\SQLEXP RESS03' Step3: Recheck if the new server name is added to the sys.servers table. If yes, try then rerunning the select query which throwed the error. Now it should pull data from the table in the new server successfully.

Difference between Clustered Index Scan and Index Scan in SQL Server

1.Clustered Index Scan ✅ What it is: A Clustered Index Scan means SQL Server is scanning every row of the entire table, essentially performing a "table scan" because the clustered index is the table itself. 📌 When it happens: No WHERE clause or very broad filter (low selectivity). Join/filter columns aren’t indexed selectively. Query needs most or all columns (covering queries). 🧠 Performance Insight: Can be expensive for large tables. Usually appears when SQL Server can’t seek and needs to read all data. Example: Table: CREATE TABLE dbo.Sales ( SaleID INT NOT NULL IDENTITY, SaleDate DATE NOT NULL, Quantity INT NOT NULL, PRIMARY KEY (SaleID) ) Query: SELECT * FROM dbo.Sales WHERE SaleDate BETWEEN '2025-02-04' AND '2025-02-10' 2. Index Scan (Non-Clustered) ✅ What it is: A Non-Clustered Index Scan scans all rows in a specific non-clustered index( not the full table) 📌 When it happens: The query filters on a ...

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