if the picture is a table, how to find the data equal to 8 in the three fields of mobile1 or mobile2 or mobile3 although you can use where or, ask God how to write sql statements if you don t use where or. Ask for advice ...

the number of input entries on the form page determines how to design the database table if the new form an and form b or other forms do not unify the fields when submitting data, store them in the database. outline of the design idea what should i...

has the following two tables: Table a field: id,tag Table b field: id,title < H2 > query purpose: < H2 > when the tag of table an is contained in the title of table b, it is queried < H2 > the current code looks something like this: < H2 ...

oledb provider of linked server 127.0.01 returned an invalid authorization description of the message 7399 -sharp-sharp-sharp problem description the environmental background of the problems and what methods you have tried related codes Ple...

the company is the server placed in its own computer room, and the domain name is purchased on name and godday. Now I want to put it on record. How to operate it? most of the servers given online are too general ....

the following T-SQL update tablename set =e.,[00:00]=e.[00:00],[01:00]=e.[01:00],[02:00]=e.[02:00],[03:00]=e.[03:00],[04:00]=e.[04:00],[05:00]=e.[05:00],[06:00]=e.[06:00],[07:00]=e.[07:00],[08:00]=e.[08:00],[09:00]=e.[09:00],[10:00]=e.[10:00],[11:00]=e...

how to check the total number of records returned by answering query conditions in query pagination: select top 10 * from (select row_number() over(order by id asc) as rownumber,* from com_system_menu) temp_row where rownumber>((2-1)*10); the nu...

recently, I am working on a book information management system. There is a table marc that stores the information of books. There are more than 20 fields in it. when importing data, it is required to check the duplicates according to 7 fields, and the...