How do I add three columns to one column in SQL?

Question

This tutorial shows you how to use the SQL ADD COLUMN clause of the ALTER TABLE statement to add one or more columns to an existing table.

How do I add three columns of data in one column in SQL?

1CONCAT. This function is used to concatenate multiple columns or strings into a single one. ... 2CONCAT_WS. The CONCAT_WS() function not only adds multiple string values and makes them a single string value. ... 3Using them in WHERE CLAUSE. You can use both of them in WHERE CLAUSE for selection based on condition. ... 4Conclusion.

How do I add multiple columns to one column in SQL?

SQL ADD COLUMN1First, specify the table to which you want to add the new column.2Second, specify the column definition after the ADD COLUMN clause.

How do I merge columns into one column in SQL?

CONCAT(column_name1, column_name2) AS column_name;1Step 1: Create a database. ... 2Step 2: Use database. ... 3Query: CREATE TABLE demo_table( FIRSTNAME VARCHAR(20), LASTNAME VARCHAR(20), AGE INT); ... 4Step 5: View the content. ... 5Output: ... 6Method 2: By replacing the existing column.

How do I insert multiple columns in SQL?

SQL INSERT – Inserting One or More Rows Into a Table1First, the table, which you want to insert a new row, in the INSERT INTO clause.2Second, a comma-separated list of columns in the table surrounded by parentheses.3Third, a comma-separated list of values surrounded by parentheses in the VALUES clause.

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