access 与 mssql的sql语句语法差别（Syntax differences between access and MSSQL SQL statements）.docVIP

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access 与 mssql的sql语句语法差别（Syntax differences between access and MSSQL SQL statements）.doc

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access 与 mssql的sql语句语法差别（Syntax differences between access and MSSQL SQL statements）

access 与 mssql的sql语句语法差别（Syntax differences between access and MSSQL SQL statements） 0, pure access (see Microsoft jetSQL4.0 manual) Like clause wildcards are *?!, but the actual procedures in the use of ADO connection is the wildcard% and _ % matches any number of characters _ underline, a single character of any I mean... 1, for date field fields Access stands for: #1981-28-12# SQLSERVER2000 stands for 1981-02-12 2, the SQL statement distinguishes between select and update in the form of a single table operation, However, the difference between update statements in multiple table operations and the ACCESS statements in UPDATE are compared with those in SQLSERVER: UPDATE statement updating multiple tables in SQLSERVER: UPDATE Tab1 SET a.Name = b.Name FROM, Tab1, a, Tab2, B WHERE a.ID = b.ID; The same function of the SQL statement in ACCESS should be UPDATE, Tab1, a, Tab2, B SET a.Name = b.Name WHERE a.ID = b.ID; That is: the UPDATE statement in ACCESS does not have the FROM clause, and all referenced tables are listed after the UPDATE keyword Update single table: all for: UPDATE, table1, set, ab=, 12, cd=444, where... 3, delete statement Delete in access with: delete * from table1 where a2, that is, as long as the select statement of select into delete, you can. Sqlserve is: delete, from, table1, where, a2, that is, there is no * number 4, the difference between the calculated fields behind as Access can do this: select, a, sum (Num), as, kc_num, kc_num*num, as, all_kc_num, that is, you can take the field after AS as a database field to participate in the calculation. Sqlserver is: select, a, sum (Num), as, kc_num, sum (Num), *num, as, all_kc_num, that is, the field after AS can not be used as a database field to participate in the calculation. 5, [.] [] and the difference! Access multi table joint query: select, tab1, a, as, tab1a, TAB2, B, tab2b, from, tab1, TAB2, AS in the middle can not. Sqlserve: select, tab1.a, as, tab1a, tab2.b, tab2b, from, tab1, TAB2, AS