Several MySQL statements commonly used in PHP
To display a database or table:
Show databases;//can then use database_name;
Show tables;
Change table name:
ALTER TABLE table_name rename new_t;
To add a column:
ALTER TABLE table_name ADD column c_n column attributes;
To delete a column:
ALTER TABLE table_name DROP column c_n;
To create an index:
ALTER TABLE c_table Add index (C_N1,C_N2);
ALTER TABLE c_table add unique index_name (c_n);
ALTER TABLE c_table add primary key (SID);
To delete an index:
ALTER TABLE c_table DROP INDEX c_n1;
To change column information:
ALTER TABLE t_table change c_1 c_1 varchar (200);
ALTER TABLE t_table Modify 1 c_1 varchar (200);
Insert Insertion Statement:
INSERT INTO table_name (c_1,c_2)
Values (x1,1);
UPDATE statement:
UPDATE table_name set c_1 =1 where c_2=3;
To delete a database or table:
DROP TABLE table_name;
Drop database database_name;//can be deleted using mysql_drop_db ().
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