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table_create Categories TABLE_PAT_KEY ShortText
column_create Categories sub_category COLUMN_SCALAR ShortText
table_create Tags TABLE_PAT_KEY ShortText
column_create Tags category COLUMN_SCALAR Categories
table_create Memos TABLE_HASH_KEY ShortText
column_create Memos tag COLUMN_SCALAR Tags
load --table Memos
[
{"_key": "Groonga is fast!", "tag": "Groonga"},
{"_key": "Mroonga is fast!", "tag": "Mroonga"},
{"_key": "Groonga sticker!", "tag": "Groonga"},
{"_key": "Rroonga is fast!", "tag": "Rroonga"}
]
load --table Tags
[
{"_key": "Groonga", "category": "C/C++"},
{"_key": "Mroonga", "category": "C/C++"},
{"_key": "Rroonga", "category": "Ruby"}
]
load --table Categories
[
{"_key": "C/C++", "sub_category": "Programming language"},
{"_key": "Ruby", "sub_category": "Programming language"}
]
select Memos \
--drilldowns[category].table tag \
--drilldowns[category].keys category \
--drilldowns[category].output_columns _key,_nsubrecs,sub_category \
--drilldowns[sub_category].table category \
--drilldowns[sub_category].keys sub_category \
--drilldowns[sub_category].output_columns _key,_nsubrecs \
--drilldowns[tag].keys tag \
--drilldowns[tag].output_columns _key,_nsubrecs,category
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