how to update columns in 1 table from 2 another different tables

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Hi,

i have three tables
1.line2
columns are
line_id, gate_id_fk, line_name, area_id, category(gate_id_fk is unique)

2. sheet 2
columns are
gate_id, category, area_id, area, year (same gate_id is unique)

3.line3
line_id, gate_id_fk, line_name, area_id, category, area(gate_id_fk is unique)

now i need to update line2 table and the columns which i need to update in line2 table are area_id, category from sheet2 table and line3 table

condition for those tables are

suppose
line2 (l2-Alias)
sheet2 B-Alias
line3 l3-Alias

1st where condition for data which is coming from
line3 l3 is

where L2.LINE_ID= L3.LINE_ID and L2.GATE_ID_FK is null)

and
2nd where condition for data which coming from sheet2 b

where L2.GATE_ID_FK= B.GATE_ID);

my question is how to update area_id, category columns in line2 table from both the tables together

Sql query or Stored proc plz.

Posted 1-May-11 14:39pm

kkm1128

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Abhinav S 1-May-11 21:39pm

Have you tried anything so far?

1 solution

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Nayan Ambaliya · Answer 1 · 2011-05-03T18:15:00

You can achieve it in a following manner:

<br />
<br />
UPDATE              L2<br />
SET        L2.AreaID = S2.AreaID, <br />
           L2.Category = L3.Category<br />
FROM            Line2 L2<br />
INNER JOIN      Sheet2 S2 ON L2.gateID = S2.gateID<br />
INNER JOIN      Line3 L3 ON L3.gateID = S2.gateID<br />
<br />

Please let me know if you think that I am not understanding the question properly.

-Nayan
Coding is an earthly heaven