Private Function prvfnc_UpdateDGVSource(ByRef dtAllResults As DataTable, ByVal dtNoCV As DataTable, ByVal intEnumValue As Integer) As String Try Select Case intEnumValue Case Is = enmProcedure_M.SetNoReportable For Each drA As DataRow In dtNoCV.Rows For Each drB As DataRow In dtAllRe...
I recently found myself forgetting the exact syntax to update a value in a table based on the sum of another set of values in another. You cannot, for example, do this: UPDATEmSETm.Foo=SUM(s.valsum)FROM[MASTER]mINNERJOIN[Foos]sONs.ID=m.ID But you can do it with the following sub...
1、创建两个测试表，create table test_up_a(id number, value varchar2(100));create table test_up_b(id number, value varchar2(100));2、分别往两个表中插入数据；insert into test_up_a values(1,'A1');insert into test_up_a values(2,'A2');insert into test_up_a values(3,...
create table if not exists acid_update_pt(id bigint) partitioned by(ds string) tblproperties ("transactional"="true"); --添加分区。 alter table acid_update_pt add if not exists partition (ds='2019'); --插入数据。 insert overwrite table acid_update_pt partition (ds='2019') values(1),...
(saler_id) values (100); insert into bohaitest (saler_id) values (200); insert into bohaitest (saler_id) values (300); mysql> select * from bohaitest; +---+---+---+---+---+---+---+---+ | id | saler_id | assigned_cust_num | assign_type | flight_no | add_time |...
create temporary table tmp(id int(4) primary key,dr varchar(50));insert into tmp values (0,'gone'), (1,'xx'),...(m,'yy'); update table2,table1 set table2.name = table1.name where table2.id=table1.id; 多列: update a, b set a.title=b.title, a.name=b.name where a....
USE tempdb; GO DECLARE @x TABLE (ID INT, Value INT); DECLARE @y TABLE (ID INT, Value INT); INSERT @x VALUES (1, 10), (2, 20); INSERT @y VALUES (1, 100),(2, 200); WITH cte AS (SELECT * FROM @x) UPDATE cte -- cte isn't referenced by the alias. SET Value = y....
MERGE INTO table_name alias 1 USING (table|view|sub_query) alias 2 ON (join condition) WHEN MATCHED THEN UPDATE SET col1=col_val1, col2=col_val2 WHEN NOT MATCHED THEN INSERT (column_list) VALUES (column_values); 方案:在alias2中select出来的数据,每一条都跟alias1进行ON (join condition...
在一次准备处理历史数据sql时,出现这么一个问题:You can't specify target table '表名' for update in FROM clause,大致的意思就是:不能在同一张表中先select再update。 在此进行一下复盘沉淀,使用测试sql复现当时的场景(mysql是8版本),准备测试数据: ...
VALUES (1, 'AWM', '狙击枪'), (2, 'M416', '步枪'); 因为插入两条记录,所以产生两个类型为TRX_UNDO_INSERT_REC的undo日志: End of record:地址 Undo type:trx_undo_insert_rec Undo no:0 和 1 Table id:138 主键各列信息<len,value>:<4,1>和<4,2> ...