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CREATE TABLE tbl (source_id int, source_groupid int, source_nm varchar(32), category_id int, level_id int); INSERT INTO tbl VALUES (12345, 34, 'ABC', 7, 2), (67549, null, 'GI', 5, 1), (24751, null, 'BL', null, 6); SELECT CONCAT ( '{', '"id": ', source_id,', ', CASE WHEN source_groupid IS NOT NULL THEN CONCAT('"groupid": ', source_groupid,', ') END, '"name": ',source_nm,', ','"category_id": ',category_id,', ', '"level_id": ', level_id, '}' ) as full_info FROM tbl;
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