Create a new column as num containing values of the table name - sql

Question

I have two tables in SQL and want to create a new column from the table name.
In the database, there are many many tables and name are following similar pattern e.g. total_abc_001, total_abc_0002etc... I want only tables starting with total_abc to be selected..
And create a new column as num which contains the values of table name last characters like 001, 002.
I have tried like this:
DROP TABLE IF EXISTS TABLE_NEW_XY
CREATE TABLE TABLE_NEW_XY
(
email VARCHAR(MAX),
Profile VARCHAR(MAX)
)
DECLARE #Sql NVARCHAR(MAX) = '',
#TableName VARCHAR(MAX),
#Id INT
DECLARE Table_Cursor CURSOR FOR
SELECT
ROW_NUMBER() OVER (ORDER BY TABLE_NAME ASC) Id,
TABLE_NAME
FROM
INFORMATION_SCHEMA.TABLES
WHERE
TABLE_TYPE = 'BASE TABLE'
AND TABLE_NAME LIKE 'total_abc_%'
OPEN Table_Cursor
FETCH NEXT FROM Table_Cursor INTO #Id, #TableName
WHILE ##FETCH_STATUS = 0
BEGIN
IF (#Id = 1)
BEGIN
SET #Sql = #Sql + 'SELECT email, Profile FROM '+#TableName
SELECT #SQL
END
ELSE
BEGIN
SET #Sql = #Sql + ' UNION ALL SELECT email, Profile FROM '+#TableName --Modify the columns based on your column names
END
FETCH NEXT FROM Table_Cursor INTO #Id,#TableName
END
CLOSE Table_Cursor
DEALLOCATE Table_Cursor
INSERT INTO TABLE_NEW_XY
EXEC (#Sql)
Now i wanted to add a new column "num in the dynamic sql itself to get the values of the filename in the column as 001,002,003 and so on.
Can you please suggest how to achieve this?

Answer 1

If the number is always 3 digits on the end of the #TableName you can let your dynamic sql hardcode it:
IF (#Id = 1)
BEGIN
SET #Sql = #Sql + 'SELECT email, Profile, ''' + RIGHT(#TableName,3) + ''' tname FROM '+#TableName
SELECT #SQL
END
ELSE
BEGIN
SET #Sql = #Sql + ' UNION ALL SELECT email, Profile, ''' + RIGHT(#TableName,3) + ''' tname FROM '+#TableName --Modify the columns based on your column names
END
This should output:
SELECT email, Profile, '001' tname FROM total_abc_001
UNION ALL SELECT email, Profile, '002' tname FROM total_abc_002
If the n last characters you want to capture are variable you can use the same principle with some more complex find/replace functions