mysql database table DDL operations

• Lookup table
  • Discover all tables in the database
    SHOW TABLES;
  • View table field
    format: DESC Table Name
    Example: DESC STUDENT;
• Add Table
  • Add Table
    Format: CREATE TABLE table name;
    Example: CREATE TABLE the STUDENT;
  • Copy an existing table
    format: CREATE TABLE LIKE new table name already exists in the table name;
    example: CREATE TABLE STUDENT2 LIKE STUDENT;
• Modify table
  • Modify table
    format: ALTER TABLE table name RENAME TO new table name
    Example: ALTER TABLE STUDENT RENAME TO STU;
  • Add a field
    format: ALTER TABLE table name field type field ADD
    Example: ALTER TABLE STUDENT ADD ID INT;
  • Modify a field
    • Modify the field names and types of
      formats: ALTER TABLE table name CHANGE old name for the new field name field type;
      Example: ALTER TABLE STUDENT CHANGE SEX GENDER VARCHAR (10);
    • Modify Field Type
      Format: ALTER TABLE Field Name Type MODIFY table;
      Example: ALTER TABLE STUDENT MODIFY ID VARCHAR ( 10);
  • Delete field
    format: ALTER TABLE DROP table name field name;
    Example: ALTER TABLE STUDENT DROP ID;
• Delete table
  format: DROP TABLE name;
  example: DROP STUDENT;