CREATE TABLE – SQL Command项目 2006/10/23 Creates a table having the specified fields. 复制 CREATE TABLE | DBF TableName1 [NAME LongTableName] [FREE] (FieldName1 FieldType [(nFieldWidth [, nPrecision])] [NULL | NOT NULL] [CHECK lExpression1 [ERROR cMessageText1]] [DEFAULT e...
You can also use theSET COLLATEcommand before creating an index. For more information about setting collation sequences, seeOptimizing International ApplicationsandSET COLLATE Command. REFERENCES TableName2 [TAG TagName1] Specifies the parent table to which a persistent relationship is established. The ...
If we try to create a table that already exists, we get an error message'Error: table already exists'. To fix this issue, we can add the optionalIF NOT EXISTScommand while creating a table. Let's look at an example. -- create a Companies table if it does not existCREATETABLEIFNOTEX...
CREATE TABLE 陳述式包含 REFERENCES 關鍵字,可建立兩個資料表之間的「外部索引鍵」(FK) 關聯性。 如果您使用 tempdb,請在 --REFERENCES 關鍵字前加上一對破折號進行註解。 ERD 會顯示兩個資料表之間的關聯性。 tabEmployee.DepartmentCode「子」資料行中的值受限於 tabDepartment.DepartmentCode「父」資料行中的值...
-- Execute a resumable online index create statement with MAXDOP=1 CREATE INDEX test_idx1 ON test_table (col1) WITH (ONLINE = ON, MAXDOP = 1, RESUMABLE = ON); -- Executing the same command again (see above) after an index operation was paused, resumes automatically the index create op...
Type -h or --help at the command prompt to get syntax help. 您现已在 SQL Server 中具有一个地理数据库。 将创建地理数据库的相关消息写入 sde_setup.log 文件,该文件是在为运行脚本的计算机上的 %TEMP% 变量指定的目录中创建的。如果在创建地理数据库时出现任何问题,可查看此文件以解决这些问题。 接下...
SELECT wg.name AS workload_group_name, rp.name AS resource_pool_name, r.command, r.status, d.name AS database_name, COUNT(1) AS request_count, MIN(r.start_time) AS first_request_start_time, MAX(r.start_time) AS last_request_start_time, SUM(CAST(r.total_elapsed_time AS bigint...
For more information about defining a table with a LOB column (CLOB, BLOB, or DBCLOB), see Creating a table with LOB columns. If IN ACCELERATOR is specified, not all data types are supported. For example, DECFLOAT, LOB, ROWID, TIMESTAMP WITH TIME ZONE, and XML are not supported. For...
The file specified for :r command was not found error, please help. A file activation error occurred. The physical file name may be incorrect while creating database A practical approach the Nested Sets when creating hierarchies. A question about regular expressions in T-SQL A stored procedure ...
For an example of creating a new SQL table from an existing one, suppose we want to extract a female patient table and store it in a new table calledfemale_patient. Two ways to write this SQL query: SELECT patient_id, name, age, gender, address, disease, doctor_id ...