Oracle sql insert multiple rows

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Insert (SQL)

oracle sql insert multiple rows

How can I insert multiple rows of data in one SQL command in Oracle?

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This is not only boring and tedious but also time consuming. There must be smarter ways to insert multiple rows than to repeat the same syntax several times. We will discuss here how to accomplish this task in a more efficient way. With SQL, you can build databases, enter data into the database, manipulate data, and query the database data. The output or results from the query are often used in analysis or to make business decisions. SQL is a simple, friendly, English-like language that is relatively easy to learn and is being extensively used by database users and developers all over the world. Using the SELECT statement, you can choose the rows in a table that you want returned from a query by specifying values to match the rows that you want to display.

The Oracle documentation uses the term "multitable inserts", but other resources hyphenate the name, so you will also see it written as "multi-table inserts".
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The number of columns and values must be the same. If a column is not specified, the default value for the column is used. If a syntax error occurs or if any constraints are violated, the new row is not added to the table and an error returned instead. Shorthand may also be used, taking advantage of the order of the columns when the table was created. It is not required to specify all columns in the table since any other columns will take their default value or remain null :.

Anyway, I noticed something very cool that I thought was absolutely ingenious. They were inserting multiple rows in a single SQL statement, sort of like this. So, I started using the multi row insert statements, and have really loved it. Then I tried using it on an Oracle database 11g and it failed, which is odd because Oracle prides itself in being the first database to implement all the new SQL standards as soon as possible. It turns out this is an extension not a standard. But, I decided it was worth knowing how to insert multiple rows in a single statement using each of the SQL dialects that I usually work with.

Generally, SQL databases perform best when working on the whole problem at once. The very same is true for modifying data: to delete three rows we should use one delete statement with the right where clause. But how about inserting three rows at once? As a matter of fact there is a very old SQL feature making this possible: the values clause can list multiple rows :. The main drawback of this approach is that the number of rows affects the query string itself as well as the number and position of the bind parameters. Nevertheless it might be a big deal in your code base. Using a batch API is therefore better in the general case.



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