Updating table in oracle

Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).Would you like to answer one of these unanswered questions instead?To set each author contract number to zero, simply leave off the WHERE clause.If you do not specify a row, then all rows are updated when Oracle update is used.If your table t1 and it's backup t2 have many columns, here's a compact way to do it.In addition, my related problem was that only some of the columns were modified and many rows had no edits to these columns, so I wanted to leave those alone - basically restore a subset of columns from a backup of the entire table.Personally, if it wasn't for the 0.001% of the time where there's no other solution, I don't even think it should even be an available function in T-SQL.T-SQL is designed to be set-based, so it works on entire sets of data as a whole; it should NOT be used to work on data line-by-line.

You could create a trigger on table B that updates table A every time field_2 on table B is updated.

UPDATE Table1 T1 SET T1= (SELECT T2FROM Table2 T2 WHERE T2= T1.id), T1= (SELECT T2FROM Table2 T2 WHERE T2= T1.id) WHERE T1IN (SELECT T2FROM Table2 T2 WHERE T2= T1.id); The full example is here: beef is in having the columns that you want to use as the key in parentheses in the where clause before 'in' and have the select statement with the same column names in parentheses.

where (column1,column2) in ( I didn't down rate, but it isn't a good solution.

Notice that the WHERE clause identifies which row will be updated with Oracle UPDATE SQL.

You need not specify the partition name when updating values in a partitioned table.

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