MySQL implements the ranking syntax like row_numberover in Oracle or PostgreSQL _ MySQL

MySQL implements the ranking syntax such as Oracle or PostgreSQL row_numberover bitsCN. comPostgreSQL and Oracle both provide statements such as row_number () over () to rank corresponding fields, which is very convenient. MySQL does not provide such a syntax.
Table "ytt. t1" Column | Type | Modifiers -------- + ----------------------- + ----------- I _name | character varying (10) | not null rank | integer | not null

t_girl=# select * from t1 order by i_name; i_name | rank ---------+------ Charlie | 12 Charlie | 12 Charlie | 13 Charlie | 10 Charlie | 11 Lily | 6 Lily | 7 Lily | 7 Lily | 6 Lily | 5 Lily | 7 Lily | 4 Lucy | 1 Lucy | 2 Lucy | 2 Ytt | 14 Ytt | 15 Ytt | 14 Ytt | 14 Ytt | 15 (20 rows)

T_girl = # select I _name, rank, row_number () over (partition by I _name order by rank desc) as rank_number from t1; I _name | rank | rank_number --------- + ------ + ------------- Charlie | 13 | 1 Charlie | 12 | 2 Charlie | 12 | 3 Charlie | 11 | 4 Charlie | 10 | 5 Lily | 7 | 1 lily | 7 | 2 Lily | 7 | 3 Lily | 6 | 4 Lily | 6 | 5 Lily | 5 | 6 Lily | 4 | 7 Lucy | 2 | 1 Lucy | 2 | 2 lucy | 1 | 3 Ytt | 15 | 1 Ytt | 15 | 2 Ytt | 14 | 3 Ytt | 14 | 4 Ytt | 14 | 5 (20 rows)

t_girl=# select i_name,rank, row_number() over(partition by i_name ) as rank_number from t1; i_name  | rank | rank_number ---------+------+------------- Charlie |   12 |           1 Charlie|   12 |           2 Charlie|   13 |           3 Charlie|   10 |           4 Charlie|   11 |           5 Lily|    6 |           1 Lily|    7 |           2 Lily|    7 |           3 Lily|    6 |           4 Lily|    5 |           5 Lily|    7 |           6 Lily|    4 |           7 Lucy|    1 |           1 Lucy|    2 |           2 Lucy|    2 |           3 Ytt|   14 |           1 Ytt|   15 |           2 Ytt|   14 |           3 Ytt|   14 |           4 Ytt|   15 |           5(20 rows)

t_girl=# select i_name,rank, row_number() over() as rank_number from t1; i_name  | rank | rank_number ---------+------+------------- Lily |    7 |           1 Lucy|    2 |           2 Ytt|   14 |           3 Ytt|   14 |           4 Charlie|   12 |           5 Charlie|   13 |           6 Lily|    7 |           7 Lily|    4 |           8 Ytt|   14 |           9 Lily|    6 |          10 Lucy|    1 |          11 Lily|    7 |          12 Ytt|   15 |          13 Lily|    6 |          14 Charlie|   11 |          15 Charlie|   12 |          16 Lucy|    2 |          17 Charlie|   10 |          18 Lily|    5 |          19 Ytt|   15 |          20(20 rows)

DELIMITER $ USE't _ girl $ drop procedure if exists 'sp _ rownumber' $ create procedure 'sp _ rownumber' (IN f_table_name VARCHAR (64 ), IN f_column_partitionby VARCHAR (64), IN f_column_orderby VARCHAR (64), IN f_is_asc CHAR (4) BEGIN -- Created by ytt at 2014/1/10 -- Do a row_number () over () DECLARE I INT; -- Create a temporary table to save result. drop table if exists tmp_rownum; SET @ stmt = CONCAT ('create temporary table tmp_rownum select *, ''rownum'' from ', f_table_name, 'where 1 = 0 '); PREPARE s1 FROM @ stmt; EXECUTE s1; SET I = 0; SET @ j = 0; SET @ v_column_paritionby = ''; -- Check whether parition column is null or not. IF (f_column_partitionby = ''OR f_column_partitionby is null) THEN -- No additional parition column. SET @ stmt = CONCAT ('Insert into tmp_rownum select *, @ j: = @ j + 1 as rownum from ', f_table_name); PREPARE s1 FROM @ stmt; EXECUTE s1; ELSE -- Give partition column. SET @ stmt = CONCAT ('SELECT count (*) from (select count (*) from ', f_table_name, 'group by', f_column_partitionby ,') as a into @ cnt '); PREPARE s1 FROM @ stmt; EXECUTE s1; WHILE I <@ cnt DO -- Get the partition value one by one. SET @ stmt = CONCAT ('select', f_column_partitionby, 'from', f_table_name, 'group by', f_column_partitionby, 'limit', I, ', 1 into @ v_column_partitionby '); PREPARE s1 FROM @ stmt; EXECUTE s1; -- Check whether sort is needed. IF f_column_orderby = ''OR f_column_orderby is null then set @ stmt = CONCAT ('Insert into tmp_rownum select *, @ j: = @ j + 1 as rownum from ', f_table_name, 'where', f_column_partitionby, '= ''', @ v_column_partitionby, '''); else set @ stmt = CONCAT ('Insert into tmp_rownum select *, @ j: = @ j + 1 as rownum from ', f_table_name, 'where', f_column_partitionby,' = ''', @ v_column_partitionby, '''order by', f_column_orderby ,'', f_is_asc); end if; SET @ j = 0; PREPARE s1 FROM @ stmt; EXECUTE s1; SET I = I + 1; END WHILE; END IF; -- Reset all session variables. SET @ j = NULL; SET @ v_column_paritionby = NULL; SET @ cnt = NULL; SELECT * FROM tmp_rownum; END $ DELIMITER;

CALL sp_rownumber('t1','i_name','rank','desc');query resulti_namerankrownumCharlie131Charlie122Charlie123Charlie114Charlie105Lily71Lily72Lily73Lily64Lily65Lily56Lily47Lucy21Lucy22Lucy13Ytt151Ytt152Ytt143Ytt144Ytt145

Second,

CALL sp_rownumber('t1','i_name',NULL,NULL);query resulti_namerankrownumCharlie121Charlie132Charlie113Charlie124Charlie105Lily71Lily72Lily43Lily64Lily75Lily66Lily57Lucy21Lucy12Lucy23Ytt141Ytt142Ytt143Ytt154Ytt155

Third,

CALL sp_rownumber('t1',NULL,NULL,NULL);query resulti_namerankrownumLily71Lucy22Ytt143Ytt144Charlie125Charlie136Lily77Lily48Ytt149Lily610Lucy111Lily712Ytt1513Lily614Charlie1115Charlie1216Lucy217Charlie1018Lily519Ytt1520

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