If you only want to match N” as an empty string SELECT COLUMN FROM TABLE WHERE DATALENGTH(COLUMN) > 0 If you want to count any string consisting entirely of spaces as empty SELECT COLUMN FROM TABLE WHERE COLUMN <> ” If you want to use DATALENGTH for any string consisting entirely of spaces then you […]
SELECT m1.Column1, m1.Column2, m1.Column3, r.MaxTime FROM ( SELECT Column1, MAX(TimeColumn) as MaxTime FROM MyTable GROUP BY Column1 ) r INNER JOIN MyTable m1 ON m1.Column1= r.Column1AND m1.TimeColumn = r.MaxTime
The SQL Server CONCAT_WS() function concatenates two or more strings into one string with a separator. CONCAT_WS() means concatenate with separator.
Please note that with a little bit changing you can also use this query as a stored procedure.
Let’s say we have this values in the database: num — 1 2 4 5 6 8 9 11 To Find the first missing value, we can use this: ;WITH CteRN AS( SELECT *, RN = num – ROW_NUMBER() OVER(ORDER BY num) FROM tbl ) SELECT TOP 1 num – RN FROM CteRN WHERE RN […]
Always use with statement like ;WITH then you’ll never get this error. The WITH command required a ; between it and any previous command, by always using ;WITH you’ll never have to remember to do this.
You need to define a length when specifying the varchar parameter: SqlParameter TheFirstJob = cmd.Parameters.Add(“@spParam”, SqlDbType.VarChar, 50); Note: You should use the same length as defined in your SQL Server stored procedure.
CHECKPOINT GO –Cleaen Query Cache DBCC DROPCLEANBUFFERS; GO –Clean Execution Plan Cache DBCC FREEPROCCACHE; GO