Pickup words in text field - SQL server - sql

Question

My data has a text field and I want to pick up the keywords in the list of: 'mr' , 'jr', 'dr', 'ii'
these words need to have space in front and at the end.
So with the data below, the output should be:
id|text|keyword1|keyword2|keyword3|keyword4
1, 'xxxx', 'jr','mr','ii'
2, 'xxxx','mr','',''
Thank you for helping.
HHC
Create TABLE have (
id int,
text varchar(225)
);
Insert into have (id,text) values (1,'monday jr due date mr ii final');
Insert into have (id,text) values (2,'happy new year mr J');

Answer 1

You can use CHARINDEX() function within conditionals such as
SELECT id, text,
CASE WHEN CHARINDEX(' jr ',text) > 0 THEN 'jr' END AS keyword1,
CASE WHEN CHARINDEX(' mr ',text) > 0 THEN 'mr' END AS keyword2,
CASE WHEN CHARINDEX(' ii ',text) > 0 THEN 'ii' END AS keyword3,
CASE WHEN CHARINDEX(' dr ',text) > 0 THEN 'dr' END AS keyword4
FROM have

Answer 2

First grab a copy of Ngrams8K.
Next you can do this:
SELECT
h.Id,
h.[text],
ng.Token,
Keyword = ROW_NUMBER() OVER (PARTITION BY h.Id ORDER BY ng.Position)
FROM dbo.have AS h
CROSS APPLY dbo.NGrams8k(h.[text], 4) AS ng
WHERE ng.token IN (' mr ' , ' jr ', ' dr ', ' ii ');
Returns:
Id text Token Keyword
---- -------------------------------- ----------------------------
1 monday jr due date mr ii final jr 1
1 monday jr due date mr ii final mr 2
1 monday jr due date mr ii final ii 3
2 happy new year mr J mr 1
A simple modification:
SELECT
f.Id,
f.[Text],
Keyword1 = MAX(CASE f.Keyword WHEN 1 THEN f.Token ELSE '' END),
Keyword2 = MAX(CASE f.Keyword WHEN 2 THEN f.Token ELSE '' END),
Keyword3 = MAX(CASE f.Keyword WHEN 3 THEN f.Token ELSE '' END),
Keyword4 = MAX(CASE f.Keyword WHEN 4 THEN f.Token ELSE '' END)
FROM
(
SELECT h.Id, h.[text], ng.Token, Keyword =
ROW_NUMBER() OVER (PARTITION BY h.Id ORDER BY ng.Position)
FROM dbo.have AS h
CROSS APPLY dbo.NGrams8k(h.[text], 4) AS ng
WHERE ng.token IN (' mr ' , ' jr ', ' dr ', ' ii ')
) AS f
GROUP BY f.Id, f.[Text]
ORDER BY f.Id;
Returns:
Id Text Keyword1 Keyword2 Keyword3 Keyword4
---- ------------------------------- -------------- ------------ ------------- ------------
1 monday jr due date mr ii final jr mr ii
2 happy new year mr J mr