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Execution example::
column_create --table ToyBox --name price --type Int8
# [[0,1337566253.89858,0.000355720520019531],true]
column_create --table ToyBox --name weight --type Float
# [[0,1337566253.89858,0.000355720520019531],true]
load --table ToyBox
[
{"_key":"Monkey","price":15.9}
{"_key":"Flower","price":200,"weight":0.13}
{"_key":"Block","weight":25.7}
]
# [[0,1337566253.89858,0.000355720520019531],3]
select --table ToyBox --output_columns _key,price,weight
# [
# [
# 0,
# 1337566253.89858,
# 0.000355720520019531
# ],
# [
# [
# [
# 3
# ],
# [
# [
# "_key",
# "ShortText"
# ],
# [
# "price",
# "Int8"
# ],
# [
# "weight",
# "Float"
# ]
# ],
# [
# "Monkey",
# 15,
# 0.0
# ],
# [
# "Flower",
# -56,
# 0.13
# ],
# [
# "Block",
# 0,
# 25.7
# ]
# ]
# ]
# ]
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