优化SQL一条-Mysql Tutorial-php.cn

Home

Database

Mysql Tutorial

优化SQL一条

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 07, 2016 pm 02:54 PM

optimization

昨天大半夜接到一条SQL，反应说很慢，我非常愤怒，经过询问，三个月才需要跑这个SQL一次，你tm非要在马上法定节假日了跑它吗? SQL如下(巨长无比) ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

　　昨天大半夜接到一条SQL，反应说很慢，我非常愤怒，经过询问，三个月才需要跑这个SQL一次，你tm非要在马上法定节假日了跑它吗?

　　SQL如下(巨长无比)

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

select * from table(dbms_xplan.display_cursor(lower('0ah5a8dbk28fh')));

PLAN_TABLE_OUTPUT

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

SQL_ID 0ah5a8dbk28fh, child number 0

-------------------------------------

INSERT INTO END_TRANS_ACCOUNT( BRANCH_NO ,COST_CENTER ,CNTR_NO ,IPSN_NO

,POL_CODE ,ACCOUNT_NO ,I_INFO_GROUP_FLAG ,SG_NO ,CURRENCY_CODE

,VALID_DATE ,CNTR_STAT ,INVALID_DATE ,ENDORSE_STAT ,REDUCE_START_DATE

,GROUP_FLAG ,SET_STAT ,FREEZE_STAT ,DEAD_DATE ,DEAD_CODE ,MED_DATE

,ADJ_STOP_CAUSE ,ADJ_STOP_DATE ,DUTY_STOP_DATE ,IPSN_AGE ,IPSN_SEX

,IPSN_NUM ,I_INFO_PAY_ITRVL ,I_INFO_PAY_DUR ,I_INFO_PREM

,I_INFO_INSUR_DUR ,FACE_AMNT ,EXPIRY_AMNT ,SUM_ASS_AMNT ,FEE_ITRVL

,REV_GRNT ,REV_GRNT_RATE ,RIDER_INFO ,RIDER1_CNTR_NO ,RIDER2_CNTR_NO

,RIDER3_CNTR_NO ,RIDER1_SA ,RIDER2_SA ,ACCOUNT_V_B ,ACCOUNT_V_E

,BONUS_RATIO ,CLAIM_FLAG ,PREM_PAID_NUM ,LAST_PREM_DATE ,LAST_PREM

,YEAR_PREM_SG ,YEAR_PREM_RG ,FTP_PREM ,SUM_PREM ,OCC_AMNT ,PALBD_AMNT

,FEE_INCOME ,FEE_INCOME_TOTAL ,BONUS_PERSISTENCY

,BONUS_PERSISTENCY_TOTAL ,BONUS_CREDITED ,INV_GRNT_RATE

,BONUS_REV_ITRVL ,BONUS_SUM ,BONUS_AMNT ,PAID_AMNT ,PAID_ANN_AMNT

,PAID_DEATH_AMNT ,PAID_DIS_AMNT ,PAID_MED_AMNT ,PAID_MED_REIMB

,PAID_EXP_AMNT ,PAID_GRANT_AMNT ,

Plan hash value: 2746060288

---------------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------------

| 0 | INSERT STATEMENT | | | | | 2581K(100)| |

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

MySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AM

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AM

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AM

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

The Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AM

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

MySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AM

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

MySQL's Role: Databases in Web ApplicationsApr 17, 2025 am 12:23 AM

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

MySQL: Building Your First DatabaseApr 17, 2025 am 12:22 AM

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL: A Beginner-Friendly Approach to Data StorageApr 17, 2025 am 12:21 AM

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.

See all articles