Extend CHARINDEX with occurance matching
Retrieve the charindex of matching string for the desired occurrence
2011-04-13 (first published: 2011-04-06)
1,491 reads
T-SQL
2011-04-06
3,199 reads
2011-04-05
3,202 reads
2011-03-29
3,117 reads
2011-03-28
3,434 reads
Deleting large number of rows from a table in a VLDB
For enterprise systems, purging data is a reality. Today, we will see some strategies that I recently implemented to make this process work efficiently.
2013-03-08 (first published: 2011-03-24)
24,386 reads
2011-03-22
3,557 reads
Using Dynamic SQL in Stored Procedures
Dynamic SQL allows stored procedures to “write” or dynamically generate their SQL statements. The most common use case for dynamic SQL is stored procedures with optional parameters in the WHERE clause. These are typically called from reports or screens that have multiple, optional search criteria. This article describes how to write these types of stored procedures so they execute well and resist SQL injection attacks.
2011-03-22
7,301 reads
2011-03-21
3,050 reads
2011-03-18
3,040 reads
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Question of the Day
Checking Identities
The DBCC CHECKIDENT command is used when working with identity values. I have a table with 10 rows in it that looks like this:
TravelLogID CityID StartDate EndDate 1 1 2025-01-11 2025-01-16 2 2 2025-01-11 2025-01-16 3 3 2025-01-11 2025-01-16 4 4 2025-01-11 2025-01-16 5 5 2025-01-11 2025-01-16 6 6 2025-01-11 2025-01-16 7 7 2025-01-11 2025-01-16 8 8 2025-01-11 2025-01-16 9 9 2025-01-11 2025-01-16 10 10 2025-01-11 2025-01-16The docs for DBCC CHECKIDENT say this if I run with only the table parameter: "If the current identity value for a table is less than the maximum identity value stored in the identity column, it is reset using the maximum value in the identity column. " I run this code:
DELETE dbo.TravelLog WHERE TravelLogID >= 9
GO
DBCC CHECKIDENT(TravelLog, RESEED)
GO
INSERT dbo.TravelLog
(
CityID,
StartDate,
EndDate
)
VALUES
(4, '2025-09-14', '2025-09-17')
GO
What is the identity value for the new row inserted by the insert statement above? See possible answers