A statement I currently have is the following: Now what I want is to use the enrollment dates from all users (so I would omit the "WHERE auto_patient_id ..." statement) and insert them into all corresponding rows. I tried for two users at once with the statement However this gave me an error that said "Query returned multiple rows", referring to the inner query of SELECT Date_Enrollment.
Note that the auto_patient_id's are not sequentially numbered, so I can't use a "between" there. One, werte, is where I want the values to be stored to.
Below is the TSQL code to create and populate this table.
These two different tables will be used in my UDPATE statement examples below.
LAST_NAME; The script above will update information in PERSONS_TMP table using data from PERSONS table.
In order to update a row in a SQL Server table you will use the UDPATE statement.When the subquery fails to find a matching row in tbl B, the subquery returns NULL.But since the UPDATE has no WHERE clause, it will update all rows, even those where the subquery returns NULL.Consequently, to prevent this, you might do this: One potential issue may arise when the subquery actually finds more than one matching row in tbl B.If this happens, the UPDATE will terminate with an error ("subquery may return only one row").