Inserting Empty String to Numeric Column - Oracle to SQL Server Migration. In Oracle, if you insert an empty string ('') to a NUMBER column, Oracle inserts NULL. In SQL Server, if you insert an empty string ('') to an integer column (INT i. SQL Server inserts 0, if you insert an empty string to a decimal column (DECIMAL i. Last Update: Oracle 1. R2 and Microsoft SQL Server 2. Some applications can use character data types to store values entered by a user, including numeric data, and enclose them with single quotes before inserting into a table. ![]()
If the user did not specify any value, the application can attempt to insert an empty string ('') to the numeric column. Oracle allows you to use a string literal containing a numeric value to insert data into a NUMBER column without explicit data type casting. But if you attempt to insert an empty string ('') to a NUMBER column, Oracle inserts NULL. Table definition. CREATETABLE airports. VARCHAR2(9. 0). iata_code CHAR(3). NUMBER(5). world_rank NUMBER(5)). Inserting string literal and empty string to NUMBER columns. INSERTINTO airports VALUES('San Francisco International Airport','SFO','1. You can see that Oracle inserted 1. NULL values into NUMBER columns. Oracle converted '1. NULL (since in Oracle empty string is equivalent to NULL). Similar to Oracle, SQL Server also allows you to use a string literal to insert a value into an integer column (INT data type i. But if you insert an empty string to a INT column, SQL Server inserts 0, not NULL . Table definition. Question: What is the syntax for an Oracle update statement? Answer: The Oracle update SQL syntax is too% ANSI compliant, and the Oracle documentation provides. CREATETABLE airports. VARCHAR(9. 0). iata_code CHAR(3). INT. world_rank INT). Inserting string literal and empty string to INT columns. INSERTINTO airports VALUES('San Francisco International Airport','SFO','1. You can see that SQL Server inserted 1. INT columns. If you insert an empty string to a decimal column in SQL Server, the insert statement fails. Table definition (using DECIMAL data type instead of INT)CREATETABLE airports. VARCHAR(9. 0). iata_code CHAR(3). DECIMAL(5,0). world_rank DECIMAL(5,0)). Inserting string literal and empty string to DECIMAL columns. INSERTINTO airports VALUES('San Francisco International Airport','SFO','1. Msg 8. 11. 4, Level 1. State 5, Line 1# Error converting data type varchar to numeric. For a DECIMAL data type, you have to explicitly specify 0 or NULL instead of the empty string. SQLines offers database administration, optimization and migration services for Oracle and SQL Server databases and. For more information, please Contact Us. Written by Dmitry Tolpeko, dmtolpeko@sqlines.
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