utPLSQL: How can i compare two tables?

问题

Lets say i have table 1 and table 2. Table 2 is the updated version of table one. It can have same or updated structure, columns and data. I want to compare those two tables.

回答1:

=> Sample Query to compare the structure of tables (add columns like datatype and other comparison parameters as you need ) here using all_tab_cols:

SELECT
    t1.table_name
   ,t2.table_name
   ,t1.column_name
   ,t2.column_name
FROM
    (
        SELECT
            *
        FROM
            all_tab_cols
        WHERE
            table_name = 'TEMP1'
    ) t1
    FULL OUTER JOIN (
        SELECT
            *
        FROM
            all_tab_cols
        WHERE
            table_name = 'TEMP2'
    ) t2 ON t1.owner = t2.owner
            AND t1.column_name = t2.column_name;

To Compare data :
1. You can Use a similar query with join different types of join to compare like left and right join.
  
  SELECT * FROM temp1 t1 FULL JOIN temp2 t2 ON t1.id = t2.id;
2. You can Use Set operations like union ,unionall and intersect to compare further use distinct.

回答2:

My requirement was to compare columns, data and constraints of two tables using utPLSQL. i met my requirement by using native refcursors.

For data comparison:

OPEN p_store FOR SELECT * FROM customers@dblink2;
OPEN p_store2 FOR SELECT * FROM customers2@dblink2;
ut.expect(p_store).to_equal(p_store2);

For column comparison:

OPEN p_store FOR
SELECT
    A.COLUMN_NAME,
    A.DATA_TYPE,
    A.DATA_LENGTH
FROM
    (SELECT * FROM USER_TAB_COLUMNS@dblink2 WHERE TABLE_NAME  = 'CUSTOMERS') A;
OPEN p_store2 FOR
SELECT
  B.COLUMN_NAME,
  B.DATA_TYPE,
  B.DATA_LENGTH
FROM
  (SELECT * FROM user_tab_columns@dblink2 WHERE table_name = 'CUSTOMERS') B;
ut.expect(p_store).to_equal(p_store2);

I using utPLSQL V3. If you're using v2 then utassert.eqtable can be used.

回答3:

If you want to compare all columns in 2 tables then try below query

select * from table1 t1,table2 t2 where t1.id = t2.id

But if you want compare some specified columns then try below query

select t1.column,t2.column from table1 t1,table2 t2 where t1.id = t2.id
group by t1.column,t2.column

It should be work for your requirement.

来源：https://stackoverflow.com/questions/53405858/utplsql-how-can-i-compare-two-tables

标签

Oracle

unit-testing

plsql

utplsql