RedShift 中更新语句中的表别名

Question

I have a sql statement which is as follows which I am trying to convert to Redshift.

update #tmpHist l 
set spread = lh.spread
from table1 lh 
where  
    l.id=lh.id 

But it gives error as:

[Amazon](500310) Invalid operation: syntax error at or near "l" 

Is there a way to alias table without specifying entire table.

Answer 1

The correct syntax is:

UPDATE table_name SET column = { expression | DEFAULT } [,...]

[ FROM fromlist ]

[ WHERE condition ]

• Use a FROM clause to join in additional tables.

You can try this.

update #tmpHist  
set spread = lh.spread
from table1 lh 
where  
    #tmpHist.id=lh.id 

or you can try to use update .... join for alias name.

update l 
set spread = lh.spread
from table1 lh join #tmpHist on l.id=lh.id