"just-tack-on-a-number" strategy is slightly annoying when dealing with "TableNameOrTableAlias.ColumnName") to refer to the specific "Id"Ĭolumn you want, instead of "Id" and "Id1" - the "Employees.Id" and "Employers.Id" (and more generally, Straightforward after executing the above query, you can use Handle column name conflicts? In MS Access, it's much more Which the table names show up in the query, so that in the aboveĮxample, "Id" would refer to Employees.Id, while "Id1" would refer toĪlso, why does SQL Server use such a IMO brain-damaged technique to Know which "Id" column belongs to which table? My intuition tells me,Īnd limited testing seems to indicate, that it depends on the order in Other will be called "Id1." My question is, how are you supposed to The result-set will contain two "Id" columns, so SQL Server willĭisambiguate them one column will still be called "Id", while the Suppose I have two tables, Employees and Employers, whichįROM Employees LEFT JOIN Employers ON (Employees.Id=Employers.Id) Transactions, makes me wonder if your schema is messed up because youĪ (possibly dumb) question, but I've had no luck finding a definitiveĪnswer to it. You did know that a row is not a record in your posting or understand We use VIEWs, CTE, and derived tables in SQL. Same!" Instead of making ten copies of a mag tape with the same data, One place!" and not "Let's make ten copies and try to keep them all the Get rid of redundancy - the mantra is "one fact, one time, one way, Multiple tables? The major reason we moved from files to RDBMS was to He either throws the data out or throws it in the database.īut a better question why do you want to store the same data in Or ROLLBACK flag come out of the window of the house. Heĭoes not care what is happening inside he is waiting to see a COMMIT
Think of a "transaction guy" with a bucket The scope of transactions in T-SQL is independent of the block Do not commit until the end of the whole thing. Trap each insertion's error and do a ROLLBACK and return if you have aįailure.
<<Įasy enough set up a series of INSERT INTO's in a single transaction, > I have a project that I have been working on and I need to insert a record into multiple tables and I if any one of the inserts fails Ineed to rollback all of the previous inserts that were done. Them and if it errors out on table six, then I want to rollback the Illustrate, I have ten tables that need to have a record inserted into Need to rollback all of the previous inserts that were done. Record into multiple tables and I if any one of the inserts fails I I have a project that I have been working on and I need to insert a