In Oracle SQL, a semicolon (;) indicates the end of a SQL statement, while a slash (/) is used to execute a SQL statement or a series of SQL statements. A semicolon is used to separate multiple SQL statements in a single string or a script. For example, the following script contains two SQL statements separated by a semicolon:
SELECT * FROM employees;
SELECT COUNT(*) FROM employees;
The semicolon is required to indicate the end of the first statement and the beginning of the second statement.
On the other hand, a slash is used to execute a single SQL statement or a series of SQL statements in SQL*Plus, SQL Developer, or other command-line clients. Once you've entered a statement, you can execute it by typing a slash and pressing enter. For example, the following statement would be executed by typing the statement followed by a slash and pressing enter:
SELECT * FROM employees;
Also, when you are working on a script, you can end the script with a slash. For example,
SELECT * FROM employees;
SELECT COUNT(*) FROM employees;
/
This will execute all the statements in the script. It's important to note that, when working with some GUI tools like SQL Developer, the semicolon may not be necessary to end the statement, as the tool will automatically execute the statement when you press the "Execute" button or press F9.
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