[for] I made six search box, with DW to query for many conditions, but if the where clause in the or connection, and search results are set, but I want to use intersection, if use the and connection, blank condition leads to a search result is empty,
Looking for more than a lot of SQL query conditions in BBS method and statement, but a code editor is an error in DW, web page cannot be opened,
Excuse me what method can solve this problem?