我正在从 bigTable1(索引)中选择一组数据,然后将它们插入另一个 bigTable2(索引)
我有两个选择:这是个好主意:
选项1
INSERT INTO bigTable2 (bigTable2.Col1, bigTable2.Col2)
SELECT bigTable1.Col1, bigTable1.Col2 FROM bigTable1 (nolock)
WHERE bigTable1.col3 between @value1 and @value2
选项:2
CREATE #TEMP (Col1 int, Col2 varchar(200))
INSERT INTO #TEMP (Col1, Col2)
SELECT bigTable1.Col1, bigTable1.Col2 FROM bigTable1 (nolock)
WHERE bigTable1.col3 between @value1 and @value2
INSERT INTO bigTable2 (bigTable2.Col1, bigTable2.Col2)
SELECT Col1, Col2 FROM #TEMP
我不想锁定 bigTable1。请问这两者之间哪一个更好?还有其他建议吗?