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  • Constraints

    2020-12-09 13:24:16
    <p>At first, we can build out the <strong>Constraints</strong> section on data-definition.md. If it feels like the material warrants a separate page, though, we can add one. <p>For reference: - Table-...
  • constraints

    2020-12-27 00:15:07
    <div><p>do we want to have a helper function that lifts all constraints on a column?</p><p>该提问来源于开源项目:OCA/OpenUpgrade</p></div>
  • CONSTRAINTS

    千次阅读 2010-12-03 10:40:00
    CONSTRAINTS TYPE: NOT NULLUNIQUEPRIMARY KEYFOREIGN KEYCHECKCONSTRAINTS 不但可以建立在TABLE上,也可以建立在VIEW上,CONSTRAINTS 的状态:ENABLED/DISABLEDVALIDATED/NOVALIDATEDDEFERRABLE/NON-...

    CONSTRAINTS TYPE: NOT NULL
    UNIQUE
    PRIMARY KEY
    FOREIGN KEY
    CHECK
    CONSTRAINTS 不但可以建立在TABLE上,也可以建立在VIEW上,
    CONSTRAINTS 的状态:ENABLED/DISABLED
    VALIDATED/NOVALIDATED
    DEFERRABLE/NON-DEFERRABLE
    DEFERRED/IMMEDIATE
    RELY/NORELY
        例:

    CREAT TABLE DEPT(

      BM VARCHAR(12).

      DZ  VARCHAR (13),

     CONSTRAINTS DETP_UQ UNIQUE(BM) // DETP_UQ 为约束名称,如果为给出则会自动生成一个

    );

    创建表的时候没有给出约束 要想添加:ADD CONSTRAINTS DETP_UQ UNIQUE(BM,DZ)

    删除约束:DROP CONSTRAINTR DETP_UQ

    VARCHAR & NAVCHAR 的区别 ,占用内存的大小不同前者1-8000,后者1-4000

    comment on column CLS_TASK_H.IN_DATE is ' ****'//添加注释

    CONSTRAINTS EM_CHECK CHECK(XB='男',OR XB = '女') //check检验

                                                                                                                                                                        2010-12-03

    /************2010-12-06 14:14:28*************/

     

     

    在Oracle层次查询中给SIBLINGS排序

     

    ORDER SIBLINGS BY <expression> Oracle 10G新最追加的,可以保持数据的结构完整进行排序,对于

    start with   //以什么为根节点

         connect by prior(是否递归索引) 连接的条件

     

     

     

     

     

    展开全文
  • Continuous constraints

    2021-01-07 07:09:33
    <div><p>I start coding something for constraints. I want to deal separately with constraints which are not just boolean: constraints of the form g(x) >=0. <p>Not sure if I should (a) modify ...
  • <div><p>Add CPU constraints documentation <p>fixes #136 <p>Signed-off-by: Julio Montes </p><p>该提问来源于开源项目:kata-containers/documentation</p></div>
  • Adding constraints

    2020-12-09 05:10:51
    <div><p>So far I know I can add constraints as parameters to oemof objects (e.g. out_max for a maximum output) or I could define my own constraints in linear_constraints.py or mixed_integer_linear_...
  • Constraints support

    2020-12-02 09:42:46
    <div><p>BossDB checks existence of constraints in specific model. constraints_create/0 - for record creations constraints_update/0 - for record update Constraint tests are independent. Works like ...
  • Custom constraints

    2021-01-12 19:27:29
    <div><p>As fixed frame constraints are now an active topic, I decided to chime in with my implementation of something similar for 2D (I called them '~~manual~~ custom constraints'). It's ...
  • Fit constraints

    2020-11-25 19:22:42
    <p>Therefore I renamed original .fit() to .fit_constraints(), added all of its parameters to constructor and created new .fit(), which uses the parameters from constructor to build constraints and ...
  • Refactor constraints

    2021-01-06 20:22:29
    <div><p>This is a somewhat larger PR as it touches almost every module but the goal is to simplify and improve handling of constraints. The added tests hopefully will make it easier to further ...
  • Teacup Constraints

    2020-11-29 16:12:35
    <div><p>seems mixing teacup constraints into promotion, makes the constraints get ignored. <p>code available upon request.</p><p>该提问来源于开源项目:infinitered/ProMotion</p></div>
  • Quantified constraints

    2021-01-03 06:24:35
    <div><p>The <a href="https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0018-quantified-constraints.rst">proposal</a> has been accepted; the following discussion is mostly of ...
  • Constraints Support

    2020-11-29 12:16:23
    Our main changes include adding NOT NULL, DEFAULT, CHECK, consolidating PRIMARY KEY and UNIQUE constraints and adding appropriate test cases. <p>The primary changes we have made include: <ul><li>~/...
  • Constraints Programming

    2020-12-25 17:02:21
    <div><p>It would be great to be able to provide constraints on how how reductions are done with a view to implement constraint and logical programming constructs. <p>Richer level of constraints would ...
  • <div><p>This is an example constraints: <pre><code>toml [[constraints]] labels = ["zone=us", "disk=ssd"] replicas = 2 [[constraints]] labels = ["zone=cn"...
  • Additional constraints

    2020-12-01 15:21:16
    The <a href="http://www.andreasaristidou.com/publications/papers/FABRIK.pdf">FABRIK paper</a> describes ways to implement more complex constraints with irregular cone areas and hinge constraints, but...
  • add constraints

    2020-12-07 05:57:13
    Would it be possible to add the constraints to the combinator from the beginning, instead of the brute force approach that itertools is doing?</p><p>该提问来源于开源项目:more-itertools/more-...
  • Vectorised constraints

    2020-12-30 11:11:05
    <div><p>As outlined in #189, there is a case to be made that <code>Constraints</code> should be able to accept arrays for their minimum and maximum limits, where the length of those arrays is equal to...
  • Stay constraints

    2020-12-28 08:25:51
    One of the things I noticed is that there are no stay constraints. I always found them a bit of a nuisance, and if it is possible to remove them I'd like to do this as well for my own C++...
  • Unique constraints

    2020-12-09 05:33:03
    <div><p>Add support for unique constraints on vertex properties. A property can either be unique across any and all (current or future) vertex labels or it can be required to be unique amongst ...
  • Toggle constraints

    2020-12-09 07:43:04
    <div><p>Add toggling of constraints in the machine view.</p><p>该提问来源于开源项目:juju/juju-gui</p></div>
  • Constraints directory

    2020-11-30 05:20:09
    <div><p>All of Symfony constraints located into <code>Validator\Constraint</code>: ...<p>But current documentation put custom constraint inside <code>Validator\Constraints</code>: ...<p>Maybe it should be ...
  • Configuration constraints

    2020-12-27 02:44:31
    <div><p>Is there a natural way of defining constraints on the search space? </p><p>该提问来源于开源项目:automl/HpBandSter</p></div>
  • Config constraints

    2020-12-09 10:39:10
    <div><p>Allows constraints to be specified on config keys. <p>Constraints are eagerly enforced when entities are first managed and when policies and enrichers are created. At other times they are not...
  • Uniqueness constraints

    2020-12-26 09:11:16
    <div><p>What's the best way to validate uniqueness constraints of an attribute in Domain ? </p><p>该提问来源于开源项目:zilverline/sequent</p></div>

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