Insert

What Does Insert Mean?

Insert is a widely-used command in the Structured Query Language (SQL) data manipulation language (DML) used by SQL Server and Oracle relational databases. The insert command is used for inserting one or more rows into a database table with specified table column values. The first DML command executed immediately after a table creation is the insert statement.

Advertisements

Techopedia Explains Insert

A normal insert statement may be implemented in two forms:

  • INSERT INTO table_name VALUES (val1, val2, val3…). An example is: INSERT INTO Employee VALUES (1, John, 23);
  • INSERT INTO table_name (column1, column2) VALUES (val1, val2, val3…). An example is: INSERT INTO Employee (Eid, Name, Age) VALUES (1, John, 23);

Column names identify columns that must be populated with specific values determined by VALUES clause expressions. The number VALUES clause values and names columns is the same. Table columns without specified insert statement values are assigned default values.

Insert operations can result in errors from defined column constraint violations or database inactivity. In both cases, exceptions are thrown and handled by error handlers that set appropriate values for error text, native errors, state and SQL code. If the target insert data column is set to a binary data type, such as BLOB, the input message is also in bit stream form. In rare cases, the input message may be in the Extensible Markup Language (XML) domain, where the message tree is serialized before an insert operation. Insert statements are also used in association with SELECT, WHEN, check options and return clauses.

Advertisements

Related Terms

Margaret Rouse

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.