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>db2_primary_keys</H1
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><P
>    (PECL)</P
>db2_primary_keys&nbsp;--&nbsp;
   Returns a result set listing primary keys for a table
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN82179"
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><H2
>说明</H2
>resource <B
CLASS="methodname"
>db2_primary_keys</B
> ( resource connection, string qualifier, string schema, string table-name )<BR
></BR
><P
>&#13;   Returns a result set listing the primary keys for a table.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN82197"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>connection</CODE
></DT
><DD
><P
>&#13;       A valid connection to an IBM DB2, Cloudscape, or Apache Derby database.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>qualifier</CODE
></DT
><DD
><P
>&#13;       A qualifier for DB2 databases running on OS/390 or z/OS servers. For
       other databases, pass <TT
CLASS="constant"
><B
>NULL</B
></TT
> or an empty string.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>schema</CODE
></DT
><DD
><P
>&#13;       The schema which contains the tables. If <CODE
CLASS="parameter"
>schema</CODE
>
       is <TT
CLASS="constant"
><B
>NULL</B
></TT
>, <B
CLASS="function"
>db2_primary_keys()</B
> matches the schema for
       the current connection.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>table-name</CODE
></DT
><DD
><P
>&#13;       The name of the table.
      </P
></DD
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>
  </P
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><DIV
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><A
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></A
><H2
>返回值</H2
><P
>&#13;   Returns a statement resource with a result set containing rows describing
   the primary keys for the specified table. The result set is composed of the
   following columns:
   <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN82228"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>Column name</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>TABLE_CAT</TD
><TD
>&#13;         Name of the catalog for the table containing the primary key. The
         value is NULL if this table does not have catalogs.
        </TD
></TR
><TR
><TD
>TABLE_SCHEM</TD
><TD
>&#13;         Name of the schema for the table containing the primary key.
        </TD
></TR
><TR
><TD
>TABLE_NAME</TD
><TD
>Name of the table containing the primary key.</TD
></TR
><TR
><TD
>COLUMN_NAME</TD
><TD
>Name of the column containing the primary key.</TD
></TR
><TR
><TD
>KEY_SEQ</TD
><TD
>1-indexed position of the column in the key.</TD
></TR
><TR
><TD
>PK_NAME</TD
><TD
>The name of the primary key.</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
  </P
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><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TD
><A
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><B
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>db2_column_privileges()</B
></A
></TD
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><TR
><TD
><A
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><B
CLASS="function"
>db2_columns()</B
></A
></TD
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><TR
><TD
><A
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><B
CLASS="function"
>db2_foreign_keys()</B
></A
></TD
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><TD
><A
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><B
CLASS="function"
>db2_procedure_columns()</B
></A
></TD
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><TD
><A
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><B
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>db2_procedures()</B
></A
></TD
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><TR
><TD
><A
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><B
CLASS="function"
>db2_special_columns()</B
></A
></TD
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><B
CLASS="function"
>db2_statistics()</B
></A
></TD
></TR
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><TD
><A
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><B
CLASS="function"
>db2_table_privileges()</B
></A
></TD
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><TD
><A
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><B
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>db2_tables()</B
></A
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