sql - How to write a Stored Procedure to Select, Delete and then Insert? -


i loading sample data ui testing , trying check if data exists. if delete , insert new 1 instead. got 9 inserts , not sure if need check each row if exists delete each row insert.

this sample data trying load using sp.

insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp', getdate(), getdate(), 1);   insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp1', getdate(), getdate(), 1);   insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp2', getdate(), getdate(), 2);    insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp3', getdate(), getdate(), 3);   insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp4', getdate(), getdate(), 4);   insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp5', getdate(), getdate(), 5); ;   insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp6', getdate(), getdate(), 6);    insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp7', getdate(), getdate(), 7);    insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values  (212019, 'source', 'comp8', getdate(), getdate(), 8);

stored procedure

create procedure transaction @transaction_id int, @mdata_attrb varchar, @mdata_value varchar, @isactive bit  begin if exists (select * trans_mdata transaction_id = @transaction_id)  begin delete trans_mdata transaction_id = @transaction_id end  else insert trans_mdata (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive) values (@transaction_id, mdata_attrb, mdata_value, getdate(), getdate(), @isactive) end  end  exec [transaction] @transaction_id = 123456, @mdata_attrb = 'source', @mdata_value = 'backend', @isactive bit = 1

you can use except in insert check data matching across many columns:

--  set cte pseudo-table of test data: ; testvalues (     select distinct transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive     (     values (212019, 'source', 'comp', getdate(), getdate(), 1)         , (212019, 'source', 'comp1', getdate(), getdate(), 1)         ,(212019, 'source', 'comp2', getdate(), getdate(), 2)         ,(212019, 'source', 'comp3', getdate(), getdate(), 3)         ,(212019, 'source', 'comp4', getdate(), getdate(), 4)         ,(212019, 'source', 'comp5', getdate(), getdate(), 5)         ,(212019, 'source', 'comp6', getdate(), getdate(), 6)         ,(212019, 'source', 'comp7', getdate(), getdate(), 7)         ,(212019, 'source', 'comp8', getdate(), getdate(), 8)      ) t1 (transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive)     )     --  insert not in target table (except):     insert trans_mdata(transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive)     select transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive     testvalues     except     select transaction_id, mdata_attrb, mdata_value, created_time, last_mod_time, isactive     trans_mdata

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