SQL inserting NULL values
Inserting NULL values
The SQL INSERT statement can also be used to insert NULL value for a column.
Example:
Sample table: agents
To add values'A001','Jodi','London','.12','NULL' for a single row into the table 'agents' then, the following SQL statement can be used:
SQL Code:
INSERT INTO agents
VALUES ("A001","Jodi","London",.12,NULL);
SQL insert values in specific columns
The SQL INSERT INTO statement can also be used to insert one or more specific columns for a row. It is required to mention the column(s) name in the SQL query.
Example:
Sample table: agents
To add values'A001','Jodi', and ', 12' against the columns 'agent_code', 'agent_name' and 'commission' into the table 'agents', the following SQL statement can be used:
SQL Code:
INSERT INTO agents
(agent_code,agent_name,commission)
VALUES ("A001","Jodi",.12)
Here is a new document which is a collection of questions with short and simple answers, useful for learning SQL as well as for interviews.
Practice SQL Exercises
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- Introduction
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- SUBQUERIES on soccer Database [33 Exercises]
- Hospital Database
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SQL: Tips of the Day
SQL Server SELECT into existing table.
INSERT INTO dbo.TABLETWO SELECT col1, col2 FROM dbo.TABLEONE WHERE col3 LIKE @search_key
This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:
INSERT INTO dbo.TABLETWO (col1, col2) SELECT col1, col2 FROM dbo.TABLEONE WHERE col3 LIKE @search_key
Database: SQL Server
Ref: https://bit.ly/3y6tpA3
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