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Code Block
Standard syntax:
INSERT (OVERWRITE | INTO)OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1 FROM from_statement;
INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1 FROM from_statement;

Hive extension (multiple inserts):
FROM from_statement
INSERT OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1
[INSERT OVERWRITE | INTO) TABLE tablename2 [PARTITION ...] select_statement2] 
[INSERT INTO TABLE tablename2 [PARTITION ...] select_statement2] ...;
FROM from_statement
INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1
[INSERT (OVERWRITE | INTO) INTO TABLE tablename2 [PARTITION ...] select_statement2] 
[INSERT OVERWRITE TABLE tablename2 [PARTITION ...] select_statement2] ... ;

Hive extension (dynamic partition inserts):
INSERT (OVERWRITE | INTO)OVERWRITE TABLE tablename PARTITION (partcol1[=val1], partcol2[=val2] ...) select_statement FROM from_statement;
INSERT INTO TABLE tablename PARTITION (partcol1[=val1], partcol2[=val2] ...) select_statement FROM from_statement ;

Synopsis
  • INSERT OVERWRITE will overwrite any existing data in the table or partition
  • INSERT INTO will append to the table or partition keeping the existing data in tact.

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