Comparing Two Tables in Sqlite
I Have Two Tables and Want to Compare Rows on Sqlite Like This Table1 Table2 Field1 Field1 a a B D C F D G E F G H I and I Want to Produce Result Like This...
I have two tables and want to compare rows on sqlite like this
table1 table2
field1 field1
a a
b d
c f
d g
e
f
g
h
i
and I want to produce result like this
result_table
field1
b
c
e
h
i
How is the syntax in sqlite? Thanks
2 Answers
SELECT DISTINCT Field1
FROM Table1
WHERE Field1 Not IN
(SELECT DISTINCT Field1 FROM Table2)
SELECT columns1 FROM table1 EXCEPT SELECT columns2 FROM table2;
The SQLite EXCEPT clause returns all rows from the left SELECT statement that are not in the result of the second SELECT statement. The number of columns selected must be the same in both SELECT statements.
This works fine for small to medium size tables. Avoid for tables with millions of lines.
See Compound Select Statements and the documentation of the SQLite SELECT statement.
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