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Strict Two-Phase Locking

Two-phase

So obviously this one is too:

T1	T2
X(A)
R(A)
W(A)
U(A)
	X(A)
	X(B)
	R(A)
	W(A)
	R(B)
	W(B)
	U(B)
	U(A)
	commit
X(B)
R(B)
W(B)
U(B)
commit

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