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文档中心数据集成附录离线任务读取节点 SQL Server 离线读取

SQL Server 离线读取

最近更新时间：2023-11-21 11:22:33

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参数
说明
数据源
可用的 SQL Server 数据源。
库
支持选择、或者手动输入需读取的库名称
默认将数据源绑定的数据库作为默认库，其他数据库需手动输入库名称。
当数据源网络不联通导致无法直接拉取库信息时，可手动输入数据库名称。在数据集成网络连通的情况下，仍可进行数据同步。
模式
支持选择、或者手动输入需读取该数据源下可用的模式。
表
支持选择、或者手动输入需读取的表名称，一个任务仅支持一个表同步。
切割键
指定用于数据分片的字段，指定后将启动并发任务进行数据同步。您可以将源数据表中某一列作为切分键，建议使用主键或有索引的列作为切分键。
筛选条件（选填）
根据数据类型填写对应筛选语句，该语句会作为将要同步数据的筛选条件。
SQL Server 根据指定的 where 条件拼接 SQL，并根据该 SQL 进行数据抽取。例如在测试时，可以将 where 条件指定为 limit 10。在实际业务场景中，往往会选择当天的数据进行同步，将 where 条件指定为
gmt_create > $bizdate。
where 条件可以有效地进行业务增量同步。
where 条件为空，视作同步全表所有的信息。
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