If you use the AUTOINC clause to turn on autoincrementing for a field and specify a default value, Visual FoxPro stores the default value in the table but does not use it. Visual FoxPro uses the default value if you use the SQLALTER TABLEcommand to remove autoincrementing for the field....
SQL Commands and Functions Save Add to CollectionsAdd to plan Share via Facebookx.comLinkedInEmail Print CREATE TABLE - SQL Command Article 11/14/2006 Creates a table using the specified fields or from an array. Copy CREATE TABLE | DBF TableName1 [NAME LongTableName] [FREE] ( FieldName1...
This topic provides an explanation of the SQL grammar that is used for the CREATE EXTERNAL TABLE command.[INSERT INTO <normal-table>] SELECT <col-list> FROM EXTERNAL [name] '<data-file>' [USING '(' <Load-options>')'] CREATE EXTERNAL ...
Creates a table having the specified fields.The Visual FoxPro ODBC Driver supports the native Visual FoxPro language syntax for this command. For driver-specific information, see Driver Remarks.SyntaxCopy CREATE TABLE | DBF TableName1 [NAME LongTableName] [FREE] (FieldName1FieldType [(n...
Here, the SQL command creates a database namedCompanieswith the columns:id,name,address,emailandphone. SQL CREATE TABLE Syntax CREATETABLEtable_name ( column1 datatype, column2 datatype, column3 datatype, ... ); Here, table_nameis name of the table you want to create column...
->mysql_execute_command(sql_parse.cc) ->mysql_create_like_table(sql_table.cc),这里需要打开源表并持有LOCK_open直到创建完frm文件 ->my_copy(mysys/my_copy.c)/mysql_create_like_schema_frm(sql_table.cc) ->ha_create_table(handler.cc) ...同上... 如果是create table like,则execute command...
SQL> alter session set constraints deferred. 7. 由实体关系图到创建表的例子 s_dept 前提条件:已有region表且含唯一关键字的字段id SQL> CREATE TABLE s_dept (id NUMBER(7) CONSTRAINT s_dept_id_pk PRIMARY KEY, name VARCHAR2(25) CONSTRAINT s_dept_name_nn NOT NULL, ...
Installation SYSOPR authority (when the current SQLID of the process is set to SYSINSTL) If the table space is created implicitly, the privilege set that is defined below must include at least one of the following: The CREATETS privilege for the database explicitly specified by the IN clause...
To create a constraint, you use a CONSTRAINT clause in a CREATE TABLE or ALTER TABLE command. There are two kinds of CONSTRAINT clauses: one for creating a constraint on a single field, and another for creating a constraint on multiple fields. Single-fi...
mysql_execute_command # 根据lex->sql_command值调用对应方法执行查询操作 Sql_cmd_show_noplan::execute Sql_cmd_show_create_table::execute_inner #'执行'showcreatetable指令 mysqld_show_create # 由Sql_cmd_show_create_table::execute_inner调用,获取表创建信息 ...