Skip to main content

ISDATE FUNCTION

ISDATE function is determines whether the input expression is valid date.

Syntax:
ISDATE (Expression)
Returns:
ISDATE function returns integer value.
1- Returns the weather input expression is valid date or time.
0- Returns the weather input expression is not valid date or time.

Example -1

SELECT ISDATE(GETDATE()) AS [ISDATE]

Output:






In above example returns 1 because Getdate is valid date.

Example -2

SELECT ISDATE('SQL SERVER') AS [ISDATE]

Output:






In above example returns 0 because not valid date.
Labels:

Comments

Post a Comment

Popular posts from this blog

Rank Functions in SQL SERVER

1 . ROW_NUMBER () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns the sequantial number of a row within the a partition of result set at 1 for the first row of the each partition. 2. RANK () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns rank for rows within the partition of result set. 3. DENSE_RANK () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns rank for rows within the partition of result set.With out any gaps in the ranking. 4. NTILE ( INTEGER_EXPRESSION ) OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Distributes the rows in an ordered partition into a specified number of groups. Examples: --create Employee table create table Employee (                 EmpId int identity ( 1 , 1 ) primary key ,              ...
1 comment
Read more

Difference between LEN and DATALENGTH

LEN: LEN function returns the number of characters in a variable .it also removes the trailing spaces and then then return the length. Example-1: DECLARE @Name VARCHAR ( 20 )= 'rakesh' SELECT LEN ( @Name ) as [len] Output: Example-2: DECLARE @Name VARCHAR ( 20 )= 'rakesh ' SELECT LEN ( @Name ) as [len] Output: When we observe above variable assigned 'rakesh ' string after that added 3 spaces . Len function removes trailing spaces not leading spaces. DATALENGTH : DATALENG function returns the number of bytes occupy in a variable .it also considered the spaces also. Example-1: DECLARE @Name VARCHAR ( 20 )= 'rakesh' SELECT DATALENGTH ( @Name ) as [DataLength] Output: Example-2: DECLARE @Name VARCHAR ( 20 )= ' rakesh ' SELECT DATALENGTH ( @Name ) as [DataLength] Output: In above example before ' r ' and after ...
Post a Comment
Read more