Let us understand the implementation of the merge statement with the help of an example. The search condition can be multiple conditions separated by the logical operators such as AND and OR similar to the condition specification in on clause of the joint statement.įurther on the result of the conditions that are specified the flow will then be transferred either to the matched case, not matched case by target or source, and perform the desired operations.įigure demonstrating operations while merging two tables Examples of SQL Merge Two Tables The source table is the name of the table whose changes will act as an event to cause changes in the target table by executing a merge statement. In the above syntax, the target table is the name of the table on which the operations are to be performed on the occurrence of results of comparison of conditions. In the above statement, we can use the merge statement to execute any of the updates, insert and delete operations togetherly based on the records that are matched or unmatched from the target and source tables that are compared by specifying conditional like join on the column contents of both the tables and according to decide which operation should be performed on what condition for all the possible matched and unmatched all using one single statement of the merge.
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