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CREATE TABLE test (id INT, csv VARCHAR(255)); INSERT INTO test VALUES (1, 'NBC1,NBC2,NAA1,NAA6'), (2, 'NAA2'), (3, 'NMA1,NAA4,NAA2,ABC1');
3 rows affected
UPDATE test SET csv = ( SELECT STRING_AGG(value, ',') FROM STRING_SPLIT(test.csv, ',') WHERE value NOT LIKE '_AA_' ); SELECT * FROM test;
id
csv
1
NBC1,NBC2
2
null
3
NMA1,ABC1