You might observe the following problems in with SQL-Editor in Web Designer:
1) SQL expression gets discarded, e.g. when changing the identifier or using "select all" button to select a dialog group;
2) Not able to select a single Dialog Group;
3) Not able to modify an existing database query (save not possible);
4) Save all button seems to be always active but doesn't do anything (even when there should be changes to be saved).
This is a product defect (28774)
This will be fixed on a future release of the product. If you require this immediately corrected, please contact support for a hotfix referencing the defect ID 28774.