When you create a primary key, SQL Server enforces the constraint behind the scenes by creating a unique index on that column and using the primary key column or columns as the keys of the index. 当你创建一个主键时,SQL Server强制在幕后对这个列创建唯一性索引,并使用主键列作为索引的键。 To...
CREATETABLEMyTable ( mycolumnnn1nvarchar, mycolumn2nvarcharCOLLATEFrisian_100_CS_AS )WITH( CLUSTERED COLUMNSTOREINDEX) ; B. 指定列的 DEFAULT 约束 以下示例显示了为列指定默认值的语法。colA列具有名为constraint_colA的默认约束,默认值为0。 SQL ...
与在CREATE TABLE 中定义表时所用的信息子集相同的信息子集。 表声明包括列定义、名称、数据类型和约束。 允许的约束类型仅为 PRIMARY KEY、UNIQUE KEY 和 NULL。 有关语法的详细信息,请参阅 CREATE TABLE (Transact-SQL) 、CREATE FUNCTION (Transact-SQL) 和DECLARE @local_variable (Transact-SQL)。 collatio...
ScriptDom AbortAfterWaitType AcceleratedDatabaseRecoveryDatabaseOption AddAlterFullTextIndexAction AddFileSpec AddMemberAlterRoleAction AddSearchPropertyListAction AddSensitivityClassificationStatement AddSignatureStatement AdHocDataSource AdHocTableReference AffinityKind AlgorithmKeyOption AllowConnectionsO...
ScriptDom Microsoft.SqlServer.TransactSql.ScriptDom AbortAfterWaitType AcceleratedDatabaseRecoveryDatabaseOption AddAlterFullTextIndexAction AddFileSpec AddMemberAlterRoleAction AddSearchPropertyListAction AddSensitivityClassificationStatement AddSignatureStatement AdHocDataSource AdHocTableReference AffinityKind Algorithm...
All script files should end with GO and line break. This is neccesary for batching scripts run throw sqlcmd or another tools. Keywords should be in UPPERCASE: SELECT, FROM, GROUP BY etc. This increases the readability of the code. Data types declaration should be in lowercase: ...
AlterSymmetricKeyStatement AlterTableAddTableElementStatement AlterTableAlterColumnOption AlterTableAlterColumnStatement AlterTableAlterIndexStatement AlterTableAlterPartitionStatement AlterTableChangeTrackingModificationStatement AlterTableConstraintModificationStatement AlterTableDropTableElement AlterTableDropTable...
CheckConstraintDefinition CheckpointStatement ChildObjectName ClassifierEndTimeOption ClassifierImportanceOption ClassifierMemberNameOption ClassifierStartTimeOption ClassifierWlmContextOption ClassifierWlmLabelOption ClassifierWorkloadGroupOption CloseCursorStatement CloseMasterKeyStatement CloseSymmetricKeyStatement Coalesce...
The second operation is to use a simple PowerShell script to make the necessary changes to the script so that it will no longer be a T-SQL script made to run in SQL Server, but a SQL script ready to run in SQLite. This is outlined in step 7 below. Here are the steps you’ll ...
Part 1 and 2 are mentioned in the scripts below. It would be better if you run each part of the script separately so you can see the results for each method. Returning values through a query Whenever you are assigning a query returned value to a variable, SET will accept and assign a...