Databases Reference
In-Depth Information
Table Actions
Show/Hide Columns
Remove
DEMO_ORDERS
7
8
9
ORDER_ID
CUSTOMER_ID
7
8
9
ORDER_TOTAL
7
8
9
ORDER_TIMESTAMP
31
USER_ID
7
8
9
Select Column for join
Data Type Indicator
Column Name
Column Selector
Figure 2-19.
The
DEMO_ORDERS
table as represented in the Query Builder
Taken from top to bottom as they appear in Figure
2-19
, these action areas are as follows:
Table Actions
displays a dialog allowing you to do one of several things:
•
Check All
allows you to quickly select or deselect all columns of the object for inclusion in
the query being built.
•
Add Parent
allows you to select and add a parent table, as defined by foreign key
relationships, to the Query Builder.
•
Add Child
allows you to select and add a child table, as defined by foreign key
relationships, to the Query Builder.
Show/Hide Columns
expands and collapses the object so the column definitions are shown
or hidden.
Remove
deletes the table and any of its related clauses from the
select
statement.
Select Column for Join
is activated by clicking the blank square next to a column name.
Doing so darkens the square and puts the Query Builder into Table Link mode. Then you
can click another blank square, either in another table or in the same table, and the Query
Builder inserts an
EQUALITY where
clause between the two columns in the SQL statement.
Data Type Indicator
indicates the data type of the column, such as
number
,
character
,
date
, and so on.
Column Name
indicates the column name as defined in the table description.
Column Selector
allows you to individually select or deselect columns to be included in the
SQL statement for processing. This may also include columns that you want to use in the
where
clause but not display in the output of the SQL statement. The basic rule is that you
need to select all the columns you want to display, but you don't necessarily have to display
all the columns you select.
