Database

ORA-00955: name is already used by an existing object error occurs while creating a table, view, index, sequence, synonym, types, constraints or other object with a name that already exists…

The ORA-00942: table or view does not exist error indicates that you are trying to run a SQL query that refers to a non-existent table or view, or that the…

ORA-22818: subquery expressions not allowed here error occurs when a subquery is found in a sql query where the subquery is not supported. Subqueries are not supported in various clauses,…

ORA-12154: TNS:could not resolve service name error occurs when the connect identifier used to connect to a database or other database service could not be resolved into a connect descriptor using…

ORA-00927: missing equal sign error occurs when the equal sign is missing in the expression in the sql query’s WHERE clause or SET clause. The equal sign is used to…

SQL Problem: ORA-00926: missing VALUES keyword error occurs when the VALUES clause in the insert statement is missing. The VALUES keyword identifies the VALUES clause. The VALUES clause specifies the…

SQL Error: ORA-00925: missing INTO keyword error occurs when the INTO keyword is missing from the insert statement. The INTO keyword specifies the name of the table into which the…

ORA-00924: missing BY keyword error occurs when the BY keyword is missing in the ORDER BY, GROUP BY, CONNECT BY, IDENTIFIED BY and PARTITION BY clauses in the Oracle SQL…

ORA-00920: invalid relational operator error occurs when a SQL query’s WHERE clause contains an invalid relational operator. Below is a list of the relational operators. Oracle could not find the…

SQL Error: ORA-00919: incorrect function error occurs when an error occurs while calling a function in the VALUES clause of the insert statement. Oracle insert statement allows you to use…

ORA-00918: column ambiguously defined error occurs when a column name in a join exists in more than one table and is thus referenced ambiguously. The ORA 00918 column ambiguously defined…

SQL Error: ORA-00917: missing comma error occurs when a comma is missing in the VALUES clause of the Oracle insert statement. In the insert statement, a comma is used to…

ORA-00911: invalid character error occurs when a special character or a non-printable character is added to the SQL Statement. If a special character other than $, _, or # is…

ORA-00910: specified length too long for its datatype error occurs when a column data type specified length is more than what Oracle supports while creating table, altering table, or declaring…

ORA-00909: invalid number of arguments error occurs when there is a discrepancy between the number of arguments expected and the number of arguments provided when executing an Oracle function in…

The "ORA-00907: missing right parenthesis" error in Oracle occurs when a left parenthesis is used without a corresponding right parenthesis in SQL statements, such as those involving the creation of…

ORA-00906: missing left parenthesis error occurs when the left parenthesis is missing in SQL statements such as create table, insert, select, subquery, and IN clause. SQL statements that include multiple…

PLS-00103: Encountered the symbol “CREATE” error occurs while running a CREATE block using script, you have not used / (front slash) to let SQLPlus know when the block completes, as…

PLS-00428: an INTO clause is expected in this SELECT statement error occurs if the INTO clause is missing in the SELECT statement in the Oracle PL/SQL block. While creating a…

ORA-02283: cannot alter starting sequence number error occurs when you use the START WITH option to change the current value. You’re attempting to reset the sequence’s current value by using…