oracle Update a table with data from another table UPDATEtable1 t1SET(name,desc)=(SELECTt2.name, t2.descFROMtable2 t2WHEREt1.id=t2.id)WHEREEXISTS(SELECT1FROMtable2 t2WHEREt1.id=t2.id ) Assuming thejoinresultsinakey-preservedview, you could alsoUPDATE(SELECTt1.id, t1.name name1, t...
UPDATEtable1 t1SET(name,desc)=(SELECT, t2.descFROMtable2 t2WHERE=)WHEREEXISTS(SELECT1FROMtable2 t2WHERE=) Assuming thejoinresultsinakey-preservedview, you could alsoUPDATE(SELECT, name1, t1.descdesc1, name2, t2.descdesc2FROMtable1 t1, table2 t2WHERE=)SETname1=name2, desc1=desc2 2....
The requirement is to write a SQL to update columns b, c and d in TableA from the columns b1, c1 and d1 from TableB where-ever the join condition satisfies and e1 > 40 in TABLEB. Oracle: UPDATE TABLEA SET (b, c, d) = (SELECT b1, c1, d1 from TABLEB WHERE TABLEB.a1 = ...
mysql>select*frominformation_schema.innodb_locks\\G***1.row***lock_id:11309021:190:3:2lock_trx_id:11309021lock_mode:X# 排它锁lock_type:RECORD# 行锁lock_table:`test_zk`.`t2`# 表名lock_index:PRIMARY# 主键索引lock_space:190lock_page:3lock_rec:2lock_data:1# 主键值为1***2.row***...
We can UPDATE a table with data from any other table in SQL. Let us consider the following two tables. CREATE TABLE student_old ( student_id INT ,
oracle的在sql语句后加for update 不是都起作用的,对于单表是可以的,但是对于多表关联(无论left join还是内连接等)都不能修改 有readonly标志。 但是再试左连接,又好使了,又可以编辑了,真实奇怪。 update这个东西,我现在还没有完全掌握,如果update不好使,就取得id后,单表去for update吧,单表肯定是可以的。.....
Or you may haveloaded data from an external sourceinto one table, and want toget some of this data into your “main tables”. We can do this in SQL. The methods to do this are different betweenOracle,SQL Server,MySQL, andPostgreSQL. ...
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In Perl (e.g., that's what I use), you could use the Spreadsheet::ParseExcel module and the DBI module to update your table; > 2) How can I update a table with the data from another table? On the other hand, using LOAD DATE INFILE on the Excel data saved as CSV would ...