ssd7 ex3
........\alter_tables.sql
........\alter_tables2.sql
........\alter_tables3.sql
........\alter_tables4.sql
........\alter_tables5.sql
........\delete_rows.sql
........\queries.sql
........\queries2.sql
........\queries3.sql
........\queries4.sql
........\queries5.sql
........\queries6.sql