PostgreSQL 9.5.25 Documentation
to ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions created an integer column and arranged for its default values to be assigned from a se- quence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases case is accepted for the digits a through f. Output is always in the first of the forms shown. IEEE Std 802-2001 specifies the second shown form (with hyphens) as the canonical form for MAC addresses, and0 码力 | 2558 页 | 6.27 MB | 1 年前3
PostgreSQL 9.5 Documentationto ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions have created an integer column and arranged for its default values to be assigned from a sequence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases case is accepted for the digits a through f. Output is always in the first of the forms shown. IEEE Std 802-2001 specifies the second shown form (with hyphens) as the canonical form for MAC addresses, and0 码力 | 2714 页 | 6.33 MB | 1 年前3
PostgreSQL 8.4 DocumentationIf you need to identify the rows in 53 Chapter 5. Data Definition a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions created an integer column and arranged for its default values to be assigned from a se- quence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases PostgreSQL will accept POSIX-style time zone specifications of the form STDoffset or STDoffsetDST, where STD is a zone abbreviation, offset is a numeric offset in hours west from UTC, and DST is an optional daylight-savings0 码力 | 2224 页 | 5.05 MB | 1 年前3
PostgreSQL 8.4 Documentationto ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions have created an integer column and arranged for its default values to be assigned from a sequence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases PostgreSQL will accept POSIX-style time zone specifications of the form STDoffset or STDoffsetDST, where STD is a zone abbreviation, offset is a numeric offset in hours west from UTC, and DST is an optional daylight-savings0 码力 | 2371 页 | 5.09 MB | 1 年前3
PostgreSQL 9.6.24 Documentationto ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions have created an integer column and arranged for its default values to be assigned from a sequence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases case is accepted for the digits a through f. Output is always in the first of the forms shown. IEEE Std 802-2001 specifies the second shown form (with hyphens) as the canonical form for MAC addresses, and0 码力 | 2814 页 | 6.58 MB | 1 年前3
PostgreSQL 9.6.24 Documentation
to ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions created an integer column and arranged for its default values to be assigned from a se- quence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases case is accepted for the digits a through f. Output is always in the first of the forms shown. IEEE Std 802-2001 specifies the second shown form (with hyphens) as the canonical form for MAC addresses, and0 码力 | 2661 页 | 6.53 MB | 1 年前3
PostgreSQL 9.0 Documentationto ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions have created an integer column and arranged for its default values to be assigned from a sequence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases PostgreSQL will accept POSIX-style time zone specifications of the form STDoffset or STDoffsetDST, where STD is a zone abbreviation, offset is a numeric offset in hours west from UTC, and DST is an optional daylight-savings0 码力 | 2561 页 | 5.55 MB | 1 年前3
PostgreSQL 9.0 Documentationto ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions created an integer column and arranged for its default values to be assigned from a se- quence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases PostgreSQL will accept POSIX-style time zone specifications of the form STDoffset or STDoffsetDST, where STD is a zone abbreviation, offset is a numeric offset in hours west from UTC, and DST is an optional daylight-savings0 码力 | 2401 页 | 5.50 MB | 1 年前3
PostgreSQL 9.4 Documentationto ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions have created an integer column and arranged for its default values to be assigned from a sequence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases PostgreSQL will accept POSIX-style time zone specifications of the form STDoffset or STDoffsetDST, where STD is a zone abbreviation, offset is a numeric offset in hours west from UTC, and DST is an optional daylight-savings0 码力 | 2603 页 | 6.05 MB | 1 年前3
PostgreSQL 9.4.26 Documentation
to ensure that this is the case. If you need to identify the rows in a table, using a sequence generator is strongly recommended. However, OIDs can be used as well, provided that a few additional precautions created an integer column and arranged for its default values to be assigned from a se- quence generator. A NOT NULL constraint is applied to ensure that a null value cannot be inserted. (In most cases PostgreSQL will accept POSIX-style time zone specifications of the form STDoffset or STDoffsetDST, where STD is a zone abbreviation, offset is a numeric offset in hours west from UTC, and DST is an optional daylight-savings0 码力 | 2452 页 | 5.99 MB | 1 年前3
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