![]() ![]() This query uses a subquery to find all values in “hardware” and then adds them to the “masterlist”. For example to copy all items from the table “hardware” to the table “masterlist” the following query can be run: When using INSERT INTO with the VALUES command it is possible to add entries by hand, however a query can also be used in place of the VALUES command. It is often used to insert single values into tables by running the command as such: This command inserts specified values into a specified table. This can be done using the INSERT command. Now that the shopkeeper’s master list has been created and structured, the data needs to be inserted into the table. With this done, the shopkeeper now has the following tables: The shopkeeper can use this to create his master list: Once filled out, this command will create a new table with the same table structure, but without any data. The easiest way to create a table with the same table structure as a different table is to use:ĬREATE TABLE AS TABLE WITH NO DATA The master list needs to have the same table structure (columns, data-types, etc.). The shopkeeper needs to first make a new table to contain the data. In order to create a master list that contains all of the store’s items and prices the shopkeeper needs to create the table for all items and copy the data from each of the departments into the new table. However the data he needs exist in separate tables containing the inventories of each department: Take for example a shopkeeper who needs to create a master list of all the items in his store to conduct a store-wide audit. It can be used to update an inventory, create a table that has different permissions than the original, and much more. INSERT INTO SELECT FROM WHERE Ĭopying data between tables is just as easy as querying data however it will take a bit longer to run than a normal query. ![]()
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