Identity field is typically used as a primary key in database. when a new record is inserted into a table, this field automatically assigns an incremented value to this column.however, inserting our ...

The primary key column is often set to auto-increment when constructing a SQL Server database. To achieve this, the IDENTITY property is enabled on the primary key column. The starting value and ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

String sql = "ALTER TABLE mytable ADD COLUMN uidpublic UUID NOT NULL, ADD COLUMN type varchar (256) COLLATE "POSIX""; jdbcTemplate.execute (sql); The migration is okay, my table is altered. But a ...