How to convert varchar to uniqueidentifier in SQL Server
By FoxLearn 10/9/2024 4:01:06 AM 292
Converting VARCHAR
to UNIQUEIDENTIFIER
in SQL Server involves using the CAST
or CONVERT
functions. However, since UNIQUEIDENTIFIER
is a specific data type that represents a globally unique identifier (GUID), you need to ensure that the values in your VARCHAR
are in a format that can be converted to a UNIQUEIDENTIFIER
.
How to convert sql string to uniqueidentifier?
id: a79b1ecd95015ae6b9c8aabb07da1020
To convert sql string to uniqueidentifier you can use the sql query as shown below.
SELECT CONVERT(uniqueidentifier,STUFF(STUFF(STUFF(STUFF('a79b1ecd95015ae6b9c8aabb07da1020',9,0,'-'),14,0,'-'),19,0,'-'),24,0,'-'))
Result
A79B1ECD-9501-5AE6-B9C8-AABB07DA1020
If you have a varchar
value representing a GUID, like '550e7400-e29b-41d4-a716-446655440000'
, you would do.
SELECT CAST('550e7400-e29b-41d4-a716-446655440000' AS uniqueidentifier)
Ensure that the varchar
value is in the correct GUID format; otherwise, the conversion will fail. If you attempt to convert a varchar
that is not a valid GUID, you will encounter an error.
To avoid errors with invalid formats, you can use a TRY_CAST
or TRY_CONVERT
, which will return NULL
for invalid conversions:
SELECT TRY_CAST('invalid guid' AS uniqueidentifier)
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