The PHP paging query assumes that the table name is A and the record data is unknown. & nbsp; it is best to use a SELECT implementation for each problem & nbsp; 1. retrieve the first 10 records in the table. (It should be written in reverse physical order) & nbsp; 2. retrieve the last 10 records in the table. (It should be written in reverse physical order) & nbsp; 3. retrieve 10th to 20th records from the table. (It should be written in reverse physical order) & nbsp; 4. retrieve the records used in the table, and add two PHP paging queries.
Assume that the table name is A and the record data is unknown.
It is best to use a SELECT statement for each problem.
1. retrieve the first 10 records in the table. (this should be written in reverse physical order)
2. retrieve the last 10 records in the table. (this should be written in reverse physical order)
3. fetch 10th to 20th records from the table (which should be written in reverse physical order)
4. retrieve the records used in the table, and add the two columns as the row number and the physical row number.
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1. select * from a limit 0, 9
2. select top (10) from a order by id desc
3. select * from a limit 9, 19
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Create table sort ('col1' INT (3) unsigned not null, 'col2' CHAR (1) not null, primary key (Col1), INDEX Col2 (Col2 ));
Insert into sort (Col1, Col2) VALUES (1, 'A ');
Insert into sort (Col1, Col2) VALUES (2, 'C ');
Insert into sort (Col1, Col2) VALUES (3, 'B ');
Insert into sort (Col1, Col2) VALUES (4, 'd ');
Insert into sort (Col1, Col2) VALUES (5, 'F ');
Insert into sort (Col1, Col2) VALUES (6, 'E ');
Insert into sort (Col1, Col2) VALUES (7, 'H ');
Insert into sort (Col1, Col2) VALUES (8, 'g ');
Insert into sort (Col1, Col2) VALUES (9, 'k ');
Insert into sort (Col1, Col2) VALUES (10, 'J ');
Insert into sort (Col1, Col2) VALUES (11, 'L ')
Insert into sort (Col1, Col2) VALUES (12, 'I ');
Insert into sort (Col1, Col2) VALUES (13, 'n ');
Insert into sort (Col1, Col2) VALUES (14, 'M ');
SELECT * FROM Table1 Limit 0, 10;
# Obtain the first 10 in physical order
SELECT * FROM Table1 Limit 10, 10;
# Obtain 10 from 10th in physical order
Query the total number of records first.
SELECT Count (*) As Count FROM Table1;
Then, process the SQL statement as shown above in your own program.
As for the reverse query by physical order,
Haha,
:《
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$ SQL = "select cardid, company, name from namecard where ";
......
$ SQL. = "limit $ offset, 10 ";
$ Result2 = mysql_query ($ SQL );
While ($ row = mysql_fetch_array ($ result2 ))
{
Show_card ($ row );
}
$ Pages = ceil ($ num/10 );
Echo "";
Echo "({$ pages} pages in total) \ n ";
If ($ offset> = 10) // $ offset is greater than 9, the previous page is displayed above the second page.
{
$ Preoffset = $ offset-10;
Echo "previous page \ n ";
}
For ($ I = 1; $ I <= $ pages; $ I ++)
{
$ Newoffset = 10 * ($ i-1 );
Echo "[$ I] \ n ";
}
If ($ pages! = 0 & ($ offset/10 + 1) <$ pages)
{
Echo "next page \ n ";
}
Echo "";
------ Solution --------------------
