mysql cast in where clause

Original: http://www.2cto.com/database/201310/250880.htmlSQL cast and CONVERT usage detailed   Summary: The following applies only to Mysqlselect {fn CONCAT (CONVERT (User_id,char), user_name)} as Str from T_SYS_ User following this applies only to

Syntax differences between MySQL and Oracle detailed comparison of some simple commands of bitsCN. comOracle and mysql 1) SQL> select to_char (sysdate, 'yyyy-mm-DD') from dual; SQL> select to_char (sysdate, 'hh24-mi-SS') from dual; Mysql> select

MySQL tips 6-MySQL language structure-function bitsCN.com 1. mathematical functions are used to perform complex arithmetic operations. MySQL supports many mathematical functions. If an error occurs, all mathematical functions return NULL. (1)

First, the literal value 1. StringA string is a sequence of characters that is caused by a single quotation mark ("') or double quotation mark ('" '). For example:‘a string‘"another string"If SQL Server mode is enabled for Nsi_quotes, you can refer

Mysql common functions, difficulties, notes, and difficulties of mysql Functions I. mathematical functionsABS (x) returns the absolute value of x.BIN (x) returns the binary value of x (OCT returns octal, HEX returns hexadecimal) CEILING (x) returns

Comparison of some simple commands of Oracle and mysql will involve many instances in this article. If you are interested, you may wish to learn more and consolidate your knowledge. Comparison of some simple commands of Oracle and mysql will involve

Table 12.14 Conversion Functions (cast function) name Description BINARY Converts a string to a binary string CAST() Convert a value to a specific type

Comparison of some simple commands of Oracle and mysql 1) SQLselectto_char (sysdate, yyyy-mm-dd) fromdual; SQLselectto_char (sysdate, hh24-mi-ss) fromdual; mysqlselectdate_format (now (), % Y-% m-% d); mysqlselecttime_format (now (), % H-% I-% S);

Comparison of some simple commands of Oracle and mysql1) SQL> select to_char (sysdate, 'yyyy-mm-dd') from dual;SQL> select to_char (sysdate, 'hh24-mi-ss') from dual;Mysql> select date_format (now (), '% Y-% m-% D ');Mysql> select time_format (now (),

Some days ago the database was invaded, the reading of the article has been modified, fortunately, timely discovery and good backup. Check the MySQL statement record, and found that this is the original sentence SQL in mischief:UPDATE table SET