In MySQL You can not specify target table for update in FROM clause error mean, you can not select a certain value to the same table, and then update the table (in the same statement). For example the following sql:
Update tms_jyxx_mx the SET gg_dm = ' 1004 ' the WHERE jyxx_id in ( the SELECT t1.jyxx_id AS jyxx_id the FROM tms_jyxx T1, tms_jyxx_mx T2 the WHERE t1.sjmc = ' Baoding Baigou Metro stations Lei Ming ' the AND t1.jyxx_id = t2.jyxx_id the AND T2. ljqh = ' 14 ' the AND t2.jysj > = ' 2019-04-30 10:17:22 ' the AND t2.jysj<= '2019-09-26 23:59:59' ORDER BY t2.jysj desc)
On the line into the following:
Update tms_jyxx_mx the SET gg_dm = ' 1004 ' the WHERE jyxx_id in ( the SELECT tt.jyxx_id from ( the SELECT t1.jyxx_id AS jyxx_id the FROM tms_jyxx T1, tms_jyxx_mx T2 the WHERE t1.sjmc = ' Baoding Baigou Metro stations Lei Ming ' the AND t1.jyxx_id = t2.jyxx_id the AND t2.ljqh = ' 14 ' the AND t2.jysj > = '2019-04-30 10:17:22' AND t2.jysj <= '2019-09-26 23:59:59' ORDER BY t2.jysj desc) tt)
That will select the results and then select it again by the middle of the table, thus avoiding the error. Note that this problem occurs only in MySQL, MsSql and Oracle does not exhibit this problem.