Sql updating multiple tables simultaneously
Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. of tickets at the begging, book= tickets booked and bal=balance of tickets from the total tickets) which describe against which Train how many tickets are available, how many were booked and what's the current balance when the user is logged in to book their tickets. My question is how to update table res and update columns which is created to store the tickets booked for each class and for a particular train name or train number. Visit Stack Exchange Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Sign up to join this community Primary Key This table holds all the information related to Train Journey. For example: IF customer books a seat in TRAIN NAME ='A', CLASS='AB' then my other table with the same row having a column "BOOK" will auto-increment.
Here is how to get started with the SQL Server MERGE command: Check out the example below with product data to get started down the path of becoming an expert with the SQL Server MERGE command to streamline your T-SQL logic. Rate --When no records are matched, insert the incoming records from source table to target table WHEN NOT MATCHED BY TARGET THEN INSERT (Product ID, Product Name, Rate) VALUES (SOURCE.
The MERGE statement basically merges data from a source result set to a target table based on a condition that you specify and if the data from the source already exists in the target or not.
The new SQL command combines the sequence of conditional INSERT, UPDATE and DELETE commands in a single atomic statement, depending on the existence of a record.
The new MERGE command looks like as below: The MERGE statement basically works as separate INSERT, UPDATE, and DELETE statements all within the same statement.
You specify a "Source" record set and a "Target" table and the join between the two.