T-SQL query to check if given set of data is available are not - sql

Question

I have a SQL Server table and my java application is sending a list of descriptions.
Now I need to verify if all the description are available in the table or not, if all the description is not available in the table then an error has to be raised with the missing description.
For example: Java application is sending message as 'tree', 'flower', 'plant'.
In SQL Server, there is a column description - I need to check if 'tree', 'flower', 'plant' are available or not.
If anyone is unavailable like 'plant' is not there in the table then raise an error that 'plant' is unavailable.
Could you please help me with this?

Answer 1

You can try to left join the table to the descriptions. If there is no match in the table, the columns from that table remain NULL, so you can filter only for NULLs. Like that you have a list of descriptions, that don't exist.
SELECT i.description
FROM (SELECT 'tree'
UNION ALL
SELECT 'flower'
UNION ALL
SELECT 'plant') i
LEFT JOIN elbat t
ON t.description = i.description
WHERE t.description IS NULL;

Answer 2

u meant somethin like this?
if not exists (select 1 from table1 where description='plant')
begin
RAISERROR('your custom error',16,1)
end

Answer 3

ALTER FUNCTION [dbo].[SplitToItems] (
#pString NVARCHAR(3999), --!! DO NOT USE MAX DATA-TYPES
#pDelimiter CHAR(1)
)
RETURNS #Items TABLE (ItemNumber INT, Item NVARCHAR(100))
BEGIN
IF Replace(#pString, '''', '') = ''
SET #pString = '';
WITH E1 (N)
AS (
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
), E2 (N)
AS (
SELECT 1
FROM E1 a, E1 b
), E4 (N)
AS (
SELECT 1
FROM E2 a, E2 b
), cteTally (N)
AS (
SELECT TOP (ISNULL(DATALENGTH(#pString), 0)) ROW_NUMBER() OVER (
ORDER BY (
SELECT NULL
)
)
FROM E4
), cteStart (N1)
AS (
SELECT 1
UNION ALL
SELECT t.N + 1
FROM cteTally t
WHERE SUBSTRING(#pString, t.N, 1) = #pDelimiter
), cteLen (N1, L1)
AS (
SELECT s.N1, ISNULL(NULLIF(CHARINDEX(#pDelimiter, #pString, s.N1), 0) - s.N1, 8000)
FROM cteStart s
)
INSERT INTO #Items
SELECT ItemNumber = ROW_NUMBER() OVER (
ORDER BY l.N1
), Item = SUBSTRING(SUBSTRING(#pString, l.N1, l.L1), 1, 100)
FROM cteLen l
RETURN
END
SELECT *
FROM dbo.SplitToItems('''tree'',''flower'',''plant''', ',')