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SELECT '0000000000'AS number INTO #T
UPDATE #T SET number=STUFF(number,5,1,'1')
SELECT * FROM #T
/**
number
----------
0000100000
(所影响的行数为 1 行)
*/
SELECT '0000000000'AS number INTO #T
UPDATE #T SET number=STUFF(number,5,1,'1')
SELECT * FROM #T
/**
number
----------
0000100000
(所影响的行数为 1 行)
*/update tb set col=stuff(col,5,1,'1') where ...