How do you check for equality in PL SQL?

In Oracle/PLSQL, you can use the = operator to test for equality in a query. For example: SELECT * FROM customers WHERE last_name = ‘Anderson’; In this example, the SELECT statement above would return all rows from the customers table where the last_name is equal to Anderson.


SQL operator. There are many ways to express the same syntax in Oracle SQL and the “not equals” operator may be expressed as “<>” or “! =”.

How do I check if two strings are not equal in SQL?

SQL Not Equal (<>) Operator

In SQL, not equal operator is used to check whether two expressions equal or not. If it’s not equal then condition will be true and it will return not matched records. Both != and <> operators are not equal operators and will return same result but !=

Which symbol is used for comparison in PL SQL?

PL/SQL Operator Precedence

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Operator Operation
+, – identity, negation
*, / multiplication, division
+, -, || addition, subtraction, concatenation

Can we commit inside a trigger?

Any change that a trigger does is committed with the transaction that fired the trigger. So yes, the change done inside the trigger will be committed “automatically”. You can’t commit inside a trigger anyway.

What can SQL not do?

The SQL NOT condition (sometimes called the NOT Operator) is used to negate a condition in the WHERE clause of a SELECT, INSERT, UPDATE, or DELETE statement.

What is the does not equal sign?

Some white supremacists have adopted the mathematical sign “” (Not Equal or Not Equal To) as a white supremacist symbol. The use of this symbol is an attempt to claim that different races are not equal to each other (and to imply that the white race is superior).

What is called in SQL?

SQL stands for Structured Query Language. SQL lets you access and manipulate databases. SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987.

Can you use != In SQL?

There is no != operator according to the ANSI/SQL 92 standard. <> is the valid SQL according to the SQL-92 standard.

Where do we declare PL SQL variables?

PL/SQL variables must be declared in the declaration section or in a package as a global variable. When you declare a variable, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name.

Which is an example of a PL SQL subprogram?

Subprogram Invocations

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A procedure invocation is a PL/SQL statement. For example: raise_salary(employee_id, amount); A function invocation is an expression.

Which error occurs while program is running and Cannot be detected by PL SQL compiler?

2) Which error occurs while the program is running and cannot be detected by the PL/SQL compiler? Explanation: A software or a hardware problem that prevents a program from working correctly is known as a runtime error. These errors might cause to lose information in the file we are working on.

Why do we need PL SQL?

PL/SQL allows sending an entire block of statements to the database at one time. This reduces network traffic and provides high performance for the applications. PL/SQL gives high productivity to programmers as it can query, transform, and update data in a database.

Is PL SQL still used?

The answer is that PL/SQL is not growing, but not going away either. Because it is used in the Oracle database, and the Oracle database is a fixture of enterprise systems world-wide, it will outlive you. High-performance batch processing has to happen close to the data, so PL/SQL will continue to rule in this area.

How does PL SQL work?

PL/SQL extends SQL by adding constructs found in procedural languages, resulting in a structural language that is more powerful than SQL. The basic unit in PL/SQL is a block. All PL/SQL programs are made up of blocks, which can be nested within each other. Typically, each block performs a logical action in the program.

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