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CREATE TABLE tablename (`ID` INTEGER, `Type` VARCHAR(1)); INSERT INTO tablename (`ID`, `Type`) VALUES ('1', 'A'), ('2', 'A'), ('3', 'B'), ('4', 'A'), ('5', 'A'), ('6', 'B'), ('7', 'B'), ('8', 'A'), ('9', 'A'), ('10', 'A');
WITH cte AS ( SELECT *, type <> LAG(type, 1, '') OVER (ORDER BY id) flag FROM tablename ) SELECT * FROM cte WHERE flag;
ID
Type
flag
1
A
1
3
B
1
4
A
1
6
B
1
8
A
1