utility table target

Tags: User statement for BSP Modify use UPD errorWhen you do address management, you need to set the other address of the user to be non-default based on the user you want to set as the default address. Need to select the user ID and update Original statement Update address Set Isdeafult = 0 where user_id = (select user_id from address where id =?) Error--can ' t specify target table ' address ' for update

MySQL in the can ' t specify target table for update in the FROM clause error means that you cannot select some of the values in the same table first, and then update the table (in the same statement). For example, the following SQL:The code is as follows: Delete from tbl where ID in ( select Max (ID) from TBL a

Incorrectly, you cannot select some values from the same table first, and then update the table (in the same statement). For example, the following SQL:Delete from the TBL where ID in(Select Max (ID) from TBL a where EXISTS(Select 1 from the TBL B where A.tac=b.tac GROUP by TAC has count (1) >1)Group BY TAC)Rewrite it to the following line:Delete from the TBL where ID in(Select a.ID from(Select MAX (ID) ID

, and the ID value is the maximum value of the table plus 1, so we will write about the following statement: MySQL>insertintovalues((selectmax from T1), ' You ' ); 1093 (HY000): You can"T1' for update in from clauseStill reported the same mistake. Can be rewritten as follows: Mysql> Insert intoT1Select(Select Max(ID)+1Papi sauce fromT1),' You'; Query OK,1Row affected (0.06sec) Records:1Duplicates:0Warnings:0MySQL> Select * fromT1;+------+------+ |

Figure exercise-bfs-the shortest number of steps from the start to the target point Time limit:1000ms Memory limit:65536k have questions? Dot here ^_^ Title description in the ancient Warcraft legend, there are two legions, one called the Scourge, one called Janissary. In their area, there are n passes, numbered 1. N, there is a channel connection between some passes. Among them, the Legion was in the 1th, and the Scourge was in the N

Label: UPDATEBpm_tksign_dataSETIsCompleted= 1 WHEREActinstid= '10000002433415' andNodeid= 'SignTask1' andIsCompleted= 0 andBatch= ( SELECT Max(A.batch) m fromBpm_tksign_data aWHEREA.actinstid= '10000002433415' andA.nodeid= 'SignTask1' ); This type of writing, MySQL versions are not supported. UPDATEBpm_tksign_dataSETIsCompleted= 1 WHEREActinstid= '10000002433415' andNodeid= 'SignTask1' andIsCompleted= 0 andBatch= ( SELECT Max(A.batch) m from (SELECT *