BEGIN;
CREATE TABLE IF NOT EXISTS "pk_managershalf" (
	"playerID"	TEXT,
	"yearID"	NUMERIC,
	"teamID"	TEXT,
	"lgID"	TEXT,
	"inseason"	NUMERIC,
	"half"	NUMERIC,
	"G"	NUMERIC,
	"W"	NUMERIC,
	"L"	NUMERIC,
	"rank"	NUMERIC,
	PRIMARY KEY("playerID","yearID","teamID","inseason","half")
);

INSERT INTO "pk_managershalf" SELECT DISTINCT * FROM "managershalf";
DROP TABLE "managershalf";
ALTER TABLE "pk_managershalf" RENAME TO "managershalf";
COMMIT;
