Selection

Step 1: Right click on the shape file from where you want select some special values from a field and click Open Attribute Table

Step 2:  From the "stroies" filed we want to select the values containing 1 to 3 (1,2&3). Write the code like bellow.

You will see the result like bellow..

Step 3: Now from the selected values (1 to 3 storied buildings) we want to select the values from "Structural" field which contain "M" or "H" character..

** Make sure to choose "Select from current selection" from dropdown and write the code like bellow.

These are the results of selected values which are 1 to 3 storied and have "M" or "H" character in Structural field.

Step 4: Now you can change these "M" or "H" character in Structural field with "L" ( for detail follow previous post of this blog)