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In short, I'm writing a tool that "exports" the results of MySQL queries to Google Spreadsheets (via the Google Data API). Some queries are joins, so to make columns unique I wanted to prefix all column names with their respective table names.
Use this query: ALTER TABLE tableName CHANGE oldcolname newcolname datatype(length); The RENAME function is used in Oracle databases. ALTER TABLE tableName RENAME COLUMN oldcolname TO newcolname datatype(length);
To change the default value of a column to a new value, you use the following syntax: ALTER TABLE table_name ALTER COLUMN column_name SET DEFAULT new_default_value Code language: SQL (Structured Query Language) (sql) The following example sets the default value of the created_date column to the current timestamp:
You can use the RENAME statement to rename an existing table. To rename columns, use the ALTER TABLE statement. About this task. When renaming tables, the source table must not be referenced in any existing definitions (view or materialized query table), triggers, SQL functions, or constraints.
RENAME TABLE table_name TO new_table_name; Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the table to which you want to rename after the RENAME TABLE keywords. Then, specify the new name of the table after the TO keyword.
Use the ALTER TABLE RENAME command to rename column names. Syntax: ALTER TABLE table_name . RENAME COLUMN old_column_name TO new_column_name; For the demo purpose, consider the following Employee table. The following SQL script will rename PinCode to ZipCode in the Employee table in Oracle, MySQL, PostgreSQL, SQLite database.
To rename a column in a table, use the following syntax: ALTER TABLE table_name. RENAME COLUMN old_name to new_name; To rename a column in a table in SQL Server, use the following syntax: SQL Server: EXEC sp_rename 'table_name.old_name', 'new_name', 'COLUMN'; ALTER TABLE - ALTER/MODIFY DATATYPE.
