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How do I compare two tables in SQL?
Compare Two Tables using UNION ALL Select * from ( Select Id_pk, col1, col2…,coln from table1, ‘Old_table’ Union all Select Id_pk, col1, col2…,coln from table2, ‘New_tbale’ ) cmpr order by Id_pk; The above query returns the all rows from both tables as old and new.
What is a full join?
FULL JOIN: FULL JOIN creates the result-set by combining result of both LEFT JOIN and RIGHT JOIN. The result-set will contain all the rows from both the tables. The rows for which there is no matching, the result-set will contain NULL values.
Which command is used to select duplicate rows from multiple tables?
Discussion Forum
| Que. | In SQL, which command is used to select only one copy of each set of duplicable rows |
|---|---|
| b. | SELECT UNIQUE |
| c. | SELECT DIFFERENT |
| d. | All of the above |
| Answer:SELECT DISTINCT |
How can I compare two tables in SQL?
Compare two tables by using joins. To compare two tables by using joins, you create a select query that includes both tables. If there is not already an existing relationship between the tables on the fields that contain the corresponding data, you create a join on the fields that you want to examine for matches.
How do you compare two tables?
To compare two tables by using a field as a criterion, you create a select query that includes both tables. You include the fields that you want to display, and you also include the field that corresponds to the field that you want to use as a criterion. You then create a criterion to compare the tables.
How do I find a table in SQL Server?
Another easiest method to find the tables by the table’s name in SQL Server database is to use the filter settings option in the object explorer in SQL Server Management Studio. In the Object Explorer in SQL Server Management Studio, go to the database and expand it. Right Click the Tables folder and select Filter in the right-click menu.
How do I export a SQL table?
Connect to the SQL instance using SQL Management Studio which has the database from which we need to export tables. Select database > Tasks > Export Data. This would launch ‘SQL Server Import and Export Wizard’. Select the Server name and database name from which we need to export tables.