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20.4.4 Relational Tables
[+/-]
You can also use X DevAPI to work with relational tables. In
MySQL, each relational table is associated with a particular
storage engine. The examples in this section use
InnoDB tables in the
world_x schema.
Confirm the Schema
To show the schema that is assigned to the db
global variable, issue db.
mysql-py> db
<Schema:world_x>
If the returned value is not Schema:world_x,
set the db variable as follows:
mysql-py> \use world_x
Schema `world_x` accessible through db.Show All Tables
To display all relational tables in the world_x
schema, use the get_tables() method on the
db object.
mysql-py> db.get_tables()
{
"city": <Table:city>,
"country": <Table:country>,
"countrylanguage": <Table:countrylanguage>
}Basic Table Operations
Basic operations scoped by tables include:
| Operation form | Description |
|---|---|
db. |
The insert() method inserts one or more records into the named table. |
db. |
The select() method returns some or all records in the named table. |
db. |
The update() method updates records in the named table. |
db. |
The delete() method deletes one or more records from the named table. |
Related Information
See Working with Relational Tables for more information.
CRUD EBNF Definitions provides a complete list of operations.
See Section 20.4.2, “Download and Import world_x Database” for instructions on setting up the
world_xschema sample.
Document created the 26/06/2006, last modified the 26/10/2018
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