Реферат: Некоторые черты SQL92 и SQL-3

<preparable statement> ::=

<preparable SQL data statement>

| <preparable SQL schema statement>

| <preparable SQL transaction statement>

| <preparable SQL session statement>

| <preparable implementation-defined statement>

<preparable SQL data statement> ::=

<delete statement: searched>

| <dynamic single row select statement>

| <insert statement>

| <dynamic select statement>

| <update statement: searched>

| <preparable dynamic delete statement: positioned>

| <preparable dynamic update statement: positioned>

<preparable SQL schema statement> ::= <SQL schema statement>

<preparable SQL transaction statement> ::= <SQL transaction statement>

<preparable SQL session statement> ::= <SQL session statement>

<dynamic select statement> ::= <cursor specification>

<dynamic simple row select statement> ::= <query specification>

<SQL statement name> ::= <statement name> | <extended statement name>

<extended statement name> ::= [scope option] <simple value specification>

<cursor specification> ::=

<query expression> [<order by clause>]

[<updatability clause>]

<updatability clause> ::=

FOR { READ ONLY | UPDATE [ OF <column name list> ] }

<query expression> ::=

<non-join query expression>

| <joined table>