Kendriya Vidyalaya, Tagore Garden, Delhi | Be a Marathon ...

Structured Query Language. ... CHAR CAHR(SIZE) VARCHAR / VARCHAR2 VARCHAR2(SIZE) DATE DD-MON-YYYY. Constraints: Constraints are the conditions that can be enforced on the attributes of a relation. ... [ (column_names)] ); The ALTER Table command is used to change the definition (structure) of existing table. ................
................