Updating 2 tables in sql

There are two ways to modify a table using information contained in other tables in the database: using sub-selects, or specifying additional tables in the you should ensure that the join produces at most one output row for each row to be modified.Because of this indeterminacy, referencing other tables only within sub-selects is safer, though often harder to read and slower than using a join.update category set catid=100 from event where event.catid=category.catid and catgroup='Concerts'; select * from category where catid=100; catid | catgroup | catname | catdesc ------- ---------- --------- --------------------------------- 100 | Concerts | Pop | All rock and pop music concerts (1 row) The advantage to this approach is that the join criteria are clearly separated from any other criteria that qualify rows for the update.

catid | catgroup | catname | catdesc ------- ---------- ----------- ----------------------------------------- 1 | Sports | MLB | Major League Baseball 2 | Sports | NHL | National Hockey League 3 | Sports | NFL | National Football League 4 | Sports | NBA | National Basketball Association 5 | Sports | MLS | Major League Soccer 6 | Shows | Musicals | Musical theatre 7 | Shows | Plays | All non-musical theatre 8 | Shows | Opera | All opera and light opera 9 | Concerts | Pop | All rock and pop music concerts 10 | Concerts | Jazz | All jazz singers and bands 11 | Concerts | Classical | All symphony, concerto, and choir concerts (11 rows)select * from category where catid between 6 and 8; catid | catgroup | catname | catdesc ------- ---------- ----------- -------------------------------------------- 6 | Theatre | Musicals | Musical theatre 7 | Theatre | Plays | All non-musical theatre 8 | Theatre | Opera | All opera and light opera (3 rows)select * from category where catname='Shows'; catid | catgroup | catname | catdesc ------- ---------- ----------- -------------------------------------------- 6 | Theatre | Shows | 7 | Theatre | Shows | 8 | Theatre | Shows | (3 rows)In this case, the CATDESC column was set to null because no default value was defined when the table was created.Hi everyone I have the following table in sql server: CREATE TABLE [DBO].[SHIFTS]( [WEEK_ENDING] DATETIME NULL,[FORENAME] VARCHAR(50) NOT NULL ,[SURNAME] VARCHAR(50) NOT NULL,[EMP_ID] VARCHAR(10) NOT NULL ,[DEPARTMENT] VARCHAR(50) NOT NULL,[SHIFT] VARCHAR(20) NOT NULL,[HOURS] INT NULL)I was wondering whether it was possible to create a front end utility in SSRS that could alter the [DEPARTMENT] ,[SHIFT] and [HOURS] fields back in the base sql table.Ideally I'd like the ability for the user to type in the requisite changes which would then update the table.Attempt to insert a new stock item along with the quantity of stock.

If the item already exists, instead update the stock count of the existing item.Because of this indeterminacy, referencing other tables only within sub-selects is safer, though often harder to read and slower than using a join. [1] Set the value of column C1 in table T to 1, only in those rows where the value of column C2 is "a".

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