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
just add “$(“th”).show();” in the end of initComplete … , initComplete: function () { … $(“th”).show(); } , …
The UNIQUE constraint ensures that all values in a column are different. Both the UNIQUE and PRIMARY KEY constraints provide a guarantee for uniqueness for a column or set of columns. A PRIMARY KEY constraint automatically has a UNIQUE constraint. However, you can have many UNIQUE constraints per table, but only one PRIMARY KEY constraint […]
There is NO way to alter computed column. You have to drop and recreate it. Let’s say you have a table with 3 column. And the 3rd one is the sum of the other two: CREATE TABLE MyTable (Column1 int, Column2 int, Column3 AS Column1 + Column2); If you want to change that computed column as multiply of the other […]
If there is no default value for the column then you can use this query: ALTER TABLE MyTable ADD CONSTRAINT df_MyTable_MyColumn DEFAULT 0 FOR MyColumn