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Chapter 2 Creating and Opening Files 31
Importing Data
SELECT ETH, OCT, CCL4 FROM Solubil
Note: JMP does not require you to end SQL statements with a semicolon.
JMP provides a graphical way of constructing simple SELECT statements without typing actual SQL.
To select certain columns from a data source, highlight them in the list of columns (Figure 2.12).
To highlight several rows,
• Shift-click to select a range of column names
• Ctrl-click (Windows and Linux) or Command-click (Macintosh) to select individual column
names.
Note that the SQL statement changes appropriately with your selections.
Sometimes, you are interested in fetching only unique records from the data source. That is, you want
to eliminate duplicate records. To enable this, use the DISTINCT keyword.
SELECT DISTINCT ETH, OCT, CCL4 FROM Solubil
Sorting Results
You can have the results sorted by one or more fields of the database. Specify the variables to sort by
using the ORDER BY command.
SELECT * FROM Solubil ORDER BY LABELS
selects all fields, with the resulting data table sorted by the LABELS variable. If you want to specify
further variables to sort by, add them in a comma-separated list.
SELECT * FROM Solubil ORDER BY LABELS, ETH, OCT
2 Creating and Opening Files
Using the WHERE Statement
With the WHERE statement, you can fetch certain rows of a data table based on conditions. For example,
you might want to select all rows where the column ETH has values greater than 1.
SELECT * FROM Solubil WHERE ETH > 1
The WHERE statement is placed after the FROM statement and can use any of the following logical
operators.
Table 2.2 WHERE Operators
Operator
Meaning
= Equal to
!= or < > Not equal to
> Greater than
< Less Than
>= Greater than or equal to