1 방법1: pysqldf 라이브러리 사용(https://pypi.python.org/pypi/pysqldf)

2 방법2: pandasql 라이브러리 사용(https://pypi.python.org/pypi/pandasql)

from pysqldf import SQLDF
import pandas as pd
import io

txt = io.StringIO("""
col1	col2
a	1
b	2
c	3
d	4
""")

df = pd.read_csv(txt, sep="\t")
df

sqldf = SQLDF(globals())
sqldf.execute("select * from df limit 3;")

from pandasql import sqldf
import pandas as pd
import io

txt = io.StringIO("""
col1	col2
a	1
b	2
c	3
d	4
""")

df = pd.read_csv(txt, sep="\t")
df

pysqldf = lambda q: sqldf(q, globals())
df2 = pysqldf("select * from df limit 3;")
df2