mysql decode function

Use the Instr () and decode () functions of Oracle for multi-condition combination of ORACLE functions The system encounters a situation where you want to process the multi-condition combination query, using the implementation methods of the instr

First, caseSimilar to If-else, the statement is as follows:Case expr when Expr1 then RETURN_EXPR1[When Expr2 then RETURN_EXPR2...When Exprn then RETURN_EXPRNELSE else_expr]ENDAnd there are two methods of judging, case field when value then return

During data capturing, You must select and judge the SQL statement. Refer to the original script to find one of them.Decode (value, if1, then1, if2, then2,If3, then3 ,... else) the function can meet this requirement. An error is reported after it is

Mysql and Oracle use the rollup function to complete row and column statistics ??? Yesterday, I suddenly saw in a blog that Mysql also had the rollup function. The original blog post used rollup for row and column statistics. The original blog post

Mysqlgt; selectif (11,10, 20); + --------------- + | if (11,10, 20) | + ----------------- + | 10 | + --------------- + 1ro Mysqlgt; select if (1 =, 20); + --------------- + | if (1 =, 20) | + ----------------- + | 10 | + --------------- + 1 ro

When using the Python flask framework +mysql with the app server on Sina app Engine (SAE) , When select returns to Chinese, the Jsonify function reports the following error: (Traceback.format_exc () to return when I am abnormal for debugging)

Oracle SQL statements do not support the boolean Type (decode & case) Version:SQL> select * from v $ version; BANNER--------------------------------------------------------------------------------Oracle Database 11g Enterprise Edition Release 11.1.0.

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)

Difference between decode and casewhen bitsCN.com Difference between decode and case when Sum: sum (decode (sign (xingji-6), '', h. real_count, 1, h. real_count, 0 )) Compared with case when, decode cannot use and to connect multiple

When using the Python flask framework +mysql with the app server on the Sina app Engine (SAE), select returns Chinese when the Jsonify function reports the following error: (To debug the traceback.format_ of return when I am abnormal) EXC ())