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I know two ways to insert data into a table
Method 1 : explicit values
INSERT INTO table
('field1', 'field2', 'field3')
VALUES ('value1', 'value2', 'value3')
Method 2 : copying data from another table
INSERT INTO table
SELECT 'field1', 'field2', 'field3'
FROM otherTable
Both work only if all the fields are populated the same way. I need to insert in the same row a mix of explicit values and copied data. Is this possible?
563
To insert records from multiple tables, use INSERT INTO SELECT statement. Here, we will insert records from 2 tables.
The SQL INSERT INTO SELECT Statement The INSERT INTO SELECT statement copies data from one table and inserts it into another table. The INSERT INTO SELECT statement requires that the data types in source and target tables match. Note: The existing records in the target table are unaffected.
Populating the Database After a database has been created, there are two ways of populating the tables – either from existing data or through the use of the user applications developed for the database.
If you are inserting data into a dependent table with foreign keys: Each non-null value you insert into a foreign key column must be equal to some value in the corresponding parent key of the parent table. If any column in the foreign key is null, the entire foreign key is considered null.
Yes, it is. (Note that in your Method 2 example, that would actually insert explicit values, and not data from the other table)
e.g.
INSERT SomeTable(FieldA, FieldB, FieldC)
SELECT FieldA, FieldB, 'Explicit Value'
FROM SomeOtherTable
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