Oracle 12g中不区分大小写的搜索

Question

I have count query, which should counts the total number of records corresponding to the displayed list, I am using like to filter out the record by matching the freetext, record exists in the table but still, query count is 0.

What I did, I supplied the text abc in the search box, but inside table the data is stored in the uppercase i,e ABC .

I want a method for case insensitive search.

QUERY:

SELECT
    COUNT(calender_id)
FROM
    calender s
    LEFT JOIN userdetail uu ON update_by = uu.user_id
WHERE
    calender_id = calender_id
     AND LOWER(s.details) LIKE 'Abc%'

Answer 1

Since you're lower ing the table's column, you should use a lowercase literal too:

LOWER(s.details) LIKE 'abc%'
-- Here ---------------^

Answer 2

for the case insensitive the easiest way is using the lower or upper, I think you should modify the query in this way:

SELECT
    COUNT(calender_id)
FROM
    calender s
    LEFT JOIN userdetail uu ON update_by = uu.user_id
WHERE
    calender_id = calender_id
     AND LOWER(s.details) LIKE 'abc%'

or

SELECT
    COUNT(calender_id)
FROM
    calender s
    LEFT JOIN userdetail uu ON update_by = uu.user_id
WHERE
    calender_id = calender_id
     AND UPPER(s.details) LIKE 'ABC%'

Answer 3

You can try below

SELECT
    COUNT(calender_id)
FROM
    calender s
    LEFT JOIN userdetail uu ON update_by = uu.user_id
WHERE
    calender_id = calender_id
     AND LOWER(s.details) LIKE lower('Abc')||'%'