[英]String to Columns SQL - PostgreSQL
您可以使用substring()
function:
select substring(the_col, 1, 2) as a,
substring(the_col, 3, 5) as b,
substring(the_col, 8, 1) as c,
substring(the_col, 9, 1) as d,
substring(the_col, 10, 1) as e,
substring(the_col, 11, 1) as f
from the_table
substring()
的另一种形式
substring(string FROM start_position for length)
SELECT SUBSTRING(column_name FROM 1 FOR 2) a,
SUBSTRING(column_name FROM 3 FOR 5) b,
SUBSTRING(column_name FROM 8 FOR 1) c,
SUBSTRING(column_name FROM 9 FOR 1) d,
SUBSTRING(column_name FROM 10 FOR 1) e,
SUBSTRING(column_name FROM 11 FOR 1) f
from your_table name
如果您的子字符串中需要正则表达式,您可以:
INSERT INTO table_name(A,B,C,D,E,F)
VALUES (
substring('bpApx14L103' from '^[a-z]{2}'),
substring('bpApx14L103', 3, 5)
[...]
);
当然同样适用于选择,
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