sort desc

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Spark Order (desc ("col")) Partial data sort failed

CauseThe data is sorted in three dimensions, with the result that the results of two of the orderBy(desc("col")) dimensions are returned correctly, and the result in the other dimension appears to be the result of a large row, the result of the

Note the asc/desc of each field using the BTREE composite Index to optimize the efficiency of the ORDER by query

The tbl_direct_pos_201506 table has 1.9 million data. Ddl:CREATE TABLE ' tbl_direct_pos_201506 ' (' Acq_ins_code ' char () not NULL DEFAULT ' COMMENT ' agency code ', ' Trace_num ' char (6) N OT null default ' COMMENT ' tracking number ', '

Note the asc/desc of each field using the BTREE composite Index to optimize the efficiency of the ORDER by query

tbl_direct_pos_201506 table has 1.9 million data, DDL:CREATE TABLE ' tbl_direct_pos_201506 ' (' Acq_ins_code ' char () not NULL DEFAULT ' COMMENT ' agency code ', ' Trace_num ' char (6) N OT null default ' COMMENT ' tracking number ', '

Note: Use BTREE to comindex ASC/DESC of each field to optimize order by query efficiency. btreeasc

Note: Use BTREE to comindex ASC/DESC of each field to optimize order by query efficiency. btreeascThe tbl_direct_pos_201506 table has 1.9 million data, DDL: Create table 'tbl _ direct_pos_201506 '('acq _ ins_code' char (13) not null default

ORDER BY descending desc, ascending ASC, Rank function rank () over () _order-by

ORDER BY descending desc, ascending ASC by age descending Select *from Student ORDER BY age DESCAscending by age Select *from Student ORDER BY age ASCRank function rank () in descending order of use age, if the sort field is the same, rank

Note: Use the BTREE compound to index the ASC/DESC of each field to optimize the orderby query efficiency.

Note: Use the BTREE compound to index the ASC/DESC of each field to optimize the orderby query efficiency.The tbl_direct_pos_201506 table has 1.9 million data, DDL: Create table 'tbl _ direct_pos_201506 '('acq _ ins_code' char (13) not null default '

ORDER BY Btcount Desc or ORDER by Btcount invalid, what sort of writing is there?

SELECT * FROM table where yz= ' 1 ' ORDER BY btcount Desc This writes output is incorrect, Btcount This field is very short, generally =0 or = 1, maximum no more than =8 When the amount of data is large, you cannot press the Btcount value of

Redis Sort Sort Command Details _redis

This article describes Redis sort commands Redis supports ordering of list,set,sorted set elements Sort ordering Command format: Sort key [by mode] [LIMIT start count] [get pattern] [asc| DESC] [ALPHA] [STORE Dstkey] 1) sort key (list) This is

Grouping is sorted according to a column, sorted by Shopid, Createtime, row_number () ordinal select No =row_number () over (partition by Shopid ORDER by Createt IME desc), * from Goods_info

Over cannot be used alone, with analytic functions: Rank (), Dense_rank (), Row_number (), and so on.Its parameters: Over (partition by columnname1 ORDER by Columnname2)Meaning: Group by the field specified by Columname1, or by the value of field

The Redis Sort command

SORT key [by mode] [LIMIT offset count] [get mode [get pattern ...]] [ASC | DESC] [ALPHA] [STORE destination] Returns or saves the sorted elements in the given list, collection, and ordered collection key. Sorting defaults to numbers as objects,

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