How to group values based on key in Alibaba MaxCompute?
I am facing issues when trying to group the values based on the key in Alibaba MaxCompute. I used similar queries before in Alibaba Cloud MaxCompute but now it throws me an error.
For instance,
SELECT * FROM table GROUP BY key;
It should work but it throws me error like
FAILED: ODPS-0130071:[1,8] Semantic analysis exception - column
reference table.value should appear in GROUP BY key
Anyone could help me with this to understand why this error occurs.
hadoop hive alibaba-cloud
edited Nov 22 '18 at 2:28
dhilt
7,77241941
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
add a comment |
I am facing issues when trying to group the values based on the key in Alibaba MaxCompute. I used similar queries before in Alibaba Cloud MaxCompute but now it throws me an error.
For instance,
SELECT * FROM table GROUP BY key;
It should work but it throws me error like
FAILED: ODPS-0130071:[1,8] Semantic analysis exception - column
reference table.value should appear in GROUP BY key
Anyone could help me with this to understand why this error occurs.
hadoop hive alibaba-cloud
edited Nov 22 '18 at 2:28
dhilt
7,77241941
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
add a comment |
I am facing issues when trying to group the values based on the key in Alibaba MaxCompute. I used similar queries before in Alibaba Cloud MaxCompute but now it throws me an error.
For instance,
SELECT * FROM table GROUP BY key;
It should work but it throws me error like
FAILED: ODPS-0130071:[1,8] Semantic analysis exception - column
reference table.value should appear in GROUP BY key
Anyone could help me with this to understand why this error occurs.
hadoop hive alibaba-cloud
edited Nov 22 '18 at 2:28
dhilt
7,77241941
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
I am facing issues when trying to group the values based on the key in Alibaba MaxCompute. I used similar queries before in Alibaba Cloud MaxCompute but now it throws me an error.
For instance,
SELECT * FROM table GROUP BY key;
It should work but it throws me error like
FAILED: ODPS-0130071:[1,8] Semantic analysis exception - column
reference table.value should appear in GROUP BY key
Anyone could help me with this to understand why this error occurs.
hadoop hive alibaba-cloud
hadoop hive alibaba-cloud
edited Nov 22 '18 at 2:28
dhilt
7,77241941
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
edited Nov 22 '18 at 2:28
dhilt
7,77241941
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
edited Nov 22 '18 at 2:28
dhilt
7,77241941
edited Nov 22 '18 at 2:28
dhilt
7,77241941
edited Nov 22 '18 at 2:28
dhilt
7,77241941
7,77241941
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
asked Nov 21 '18 at 16:54
Ranjith UdayakumarRanjith Udayakumar
30313
30313
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
In the earlier version of MaxCompute, select * from group by key is supported even when the columns that match * are not included in the GROUP BY key. Compatible with Hive, MaxCompute 2.0 prohibits this syntax unless the GROUP BY list is a column in all source tables
Examples:
Scenario 1: The GROUP BY key does not include all columns.
Incorrect Syntax:
SELECT * FROM t GROUP BY key;
Correct Syntax:
SELECT DISTINCT key FROM t;
Scenario 2: The GROUP BY key includes all columns.
Not recommended syntax:
SELECT * FROM t GROUP BY key, value; -- t has columns key and value
Recommended syntax:
SELECT DISTINCT key, value FROM t;
answered Nov 21 '18 at 19:34
VINVIN
13311
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
In the earlier version of MaxCompute, select * from group by key is supported even when the columns that match * are not included in the GROUP BY key. Compatible with Hive, MaxCompute 2.0 prohibits this syntax unless the GROUP BY list is a column in all source tables
Examples:
Scenario 1: The GROUP BY key does not include all columns.
Incorrect Syntax:
SELECT * FROM t GROUP BY key;
Correct Syntax:
SELECT DISTINCT key FROM t;
Scenario 2: The GROUP BY key includes all columns.
Not recommended syntax:
SELECT * FROM t GROUP BY key, value; -- t has columns key and value
Recommended syntax:
SELECT DISTINCT key, value FROM t;
answered Nov 21 '18 at 19:34
VINVIN
13311
add a comment |
In the earlier version of MaxCompute, select * from group by key is supported even when the columns that match * are not included in the GROUP BY key. Compatible with Hive, MaxCompute 2.0 prohibits this syntax unless the GROUP BY list is a column in all source tables
Examples:
Scenario 1: The GROUP BY key does not include all columns.
Incorrect Syntax:
SELECT * FROM t GROUP BY key;
Correct Syntax:
SELECT DISTINCT key FROM t;
Scenario 2: The GROUP BY key includes all columns.
Not recommended syntax:
SELECT * FROM t GROUP BY key, value; -- t has columns key and value
Recommended syntax:
SELECT DISTINCT key, value FROM t;
answered Nov 21 '18 at 19:34
VINVIN
13311
add a comment |
In the earlier version of MaxCompute, select * from group by key is supported even when the columns that match * are not included in the GROUP BY key. Compatible with Hive, MaxCompute 2.0 prohibits this syntax unless the GROUP BY list is a column in all source tables
Examples:
Scenario 1: The GROUP BY key does not include all columns.
Incorrect Syntax:
SELECT * FROM t GROUP BY key;
Correct Syntax:
SELECT DISTINCT key FROM t;
Scenario 2: The GROUP BY key includes all columns.
Not recommended syntax:
SELECT * FROM t GROUP BY key, value; -- t has columns key and value
Recommended syntax:
SELECT DISTINCT key, value FROM t;
answered Nov 21 '18 at 19:34
VINVIN
13311
In the earlier version of MaxCompute, select * from group by key is supported even when the columns that match * are not included in the GROUP BY key. Compatible with Hive, MaxCompute 2.0 prohibits this syntax unless the GROUP BY list is a column in all source tables
Examples:
Scenario 1: The GROUP BY key does not include all columns.
Incorrect Syntax:
SELECT * FROM t GROUP BY key;
Correct Syntax:
SELECT DISTINCT key FROM t;
Scenario 2: The GROUP BY key includes all columns.
Not recommended syntax:
SELECT * FROM t GROUP BY key, value; -- t has columns key and value
Recommended syntax:
SELECT DISTINCT key, value FROM t;
answered Nov 21 '18 at 19:34
VINVIN
13311
answered Nov 21 '18 at 19:34
VINVIN
13311
answered Nov 21 '18 at 19:34
VINVIN
13311
answered Nov 21 '18 at 19:34
VINVIN
13311
13311
add a comment |
add a comment |
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